Please Help Me With This Problem

Okay...so i found out in February that my boyfriend was talking to his eighth grade ex-girlfriend for a whole month without telling me about it. This is how it went down...I suspected something was wrong sometime in the month of January...he works in LA and he said that he was going to pick up his income tax check from H&R Block, which was in LA. I said ok because it was right next to his work. he called me back and said that he was just going to pick it up the next day. so i said ok...no biggie. when he got home he called me and told me that he was going to pick up his check. i told him that why didn't he just stop by on his way home from work. he said because he wasn't thinking about picking it up but then he thought about it and decided that he should. that's when it all started...the suspicion. by the way when he came back from picking up his check he had cut his hair and was dressed to impress. everything was left in good standing...i guess

one day while he was taking a shower someone sent him a text message and i read it. It read "I'm back in LA"...it was from someone with the name Julio...i was like WTF he has no friends named Julio...I wrote the phone number on my school book without him finding out...i was so nervous to find something that i did not want to find out...i had huge butterflies in my stomach...i got home and i dialed the number...a girl answered...i had my sister tell her that she mistakenly dialed the wrong number and asked for her name...name: Cindy Ramirez...OOOOMMMMGGGG...i wanted to punch the freaken wall. I called him back with the excuse that my parents were fighting and i needed to get out of the house...

he was parked outside my house and i went inside his car. i asked that who was Julio. he said it was some guy from work. i said are you sure. he said yes. i told him its not Cindy. he said yes. i said tell me everything. he said that he bumped into her at a check cashing place in LA and exchanged phone numbers to keep in touch. he said that they were talking since the first week of January...i started to cry...he did not seem sympathetic to what i was going through. while i was talking to him he was supposedly reading a magazine and playing with his phone...he had a grin on his face...he made it seem like it was no big deal. he said that he hid it from me because i would not let him have a friend that was a girl. he said that they were talking during the night when he left my house...by the way during that month he was leaving early from my house because he said he was tired and wanted to sleep early...i viewed the phone bill and i showed that they were talking for hours during the night almost everyday. they were also texting regularly. on his break from work he called her instead of me...the next day i called him and told him that he needed to stop talking to her if he wanted to be with me. he said that he was not going to stop talking to her and that i needed to grow up because he is going to have friends no matter what i say...i stood with him and told him that he needed to stop talking to her...he agreed

a week passed...we went bowling and he said that he found a phone at his job... he said that we should keep it just in case we lose one of ours...i said no because it was a tmobile phone and we have verizion. he said that he had to go to the restroom since he ate a lot before we went bowling...i said ok...something was not right...i said give me the phone while we were still at the bowling alley he said ok i will give it to you tomorrow cuz its at my house... i said no lets go get it now...we showed up at his house and i told him give me the phone...he pulled the phone out of his front pants pocket...WTF again...the phone was locked so i told him to give me the password so he did... i dialed my own phone number and the dam phone worked...WTF...i could not take it any more...this mother was still talking to her behind my back after i told him not to...he said that he was sooooo sorry and that he did not want to do anything with her...they were just friends...i stood with him

two weeks after this ordeal i calmly told him to tell me everything...he said that he went out with her four times after work to Jack in the Box...that just broke my weak heart even more...by the way she is married and has a child...she shouldn't be talking to other men and also hiding it from her husband. i don't know what to think anymore...

this situation made me feel less of a woman. i felt ugly, fat and not loved at all. i feel so betrayed by him. i thought everything was perfect with us. we were talking about getting married pretty soon. this experience had me think twice about marriage. i wanted to know how she looked to see how pretty she was...i finally saw her today at our school in the library...that what made me do this blog...she was pretty cute. decent sized body...i do not feel good. i feel that there is more to the story. i don't understand why he did this...(crying)...he hurt me so much...i feel that he only tells me what i want to hear now... he says that it is a mistake that he did and that it will never happen again...idk hopefully because i love him so much i come to realize that he is my everything and i will not hurt him like he did to me...i hold a huge grudge about this...i love him so much and i feel that he does not understand where i am coming from...he says that i need to just forget about it and be happy and think about our future...i see him changing his character...he is more attentive to my needs and come straight home after work...he sacrified going to his moms house for me because he knows that i will start thinking that he is doing something bad...we moved in together three weeks ago and it is going smoothly...although i sometimes get worrried about what he is doing when he is not with me...he has always treated me like his queen... he does everything that i tell him to do...when he gets out of work he calls me and now he also shows me his hours worked for the week. i appreciate everything that he is doing to make me realize that he is trying to make things work for the sake of our relationship...

how can i forget about what happened? what do you guys think? how do i move on and be happy with him without thinking constantly about it? Please Help!