ok I have been with my boyfriend since I was sixteen (I'm now twenty). We have had our ups and downs like every couple. last year my dad retired from the military and moved to michigan I decided to stay where I'm at because I love my boyfriend and didnt wanna lose him. Well the moment i moved in the relationship started taking a spin and it got outta control to the point we were fighting non stop . Well in december we decided to go on break, and since i had no where else to go we still lived together. I went to visit my family for christmas and came home to find out he messed around with another gurl. It killed me I was shocked he was honest with me but it still hurt so bad. Because of this gurls age he got into some trouble, and I was there for him. I had to watch him go thru an obession stage with this gurl and it killed me and what killed me more is the fact she told me everything. Out of the blue she sent me a myspace message confessing all. I got pisted cuz he lied to me bout some parts. A couple of weeks went by and we decided to try to put it in our past and we decided to give it another try. Ever since that incedent my trust with him hasnt been a hundred percent I get scared when I see myspace messages from other gurls or when he talks to another gurl or when a gurl calls him. I'm scared of being hurt again. I'm trying to let go of the past but I just dont know how. I want to put it behind me and go on with my life how can I start to trust him again? how can I put all that behind me?

Since the trust factor has been broken, it will take much to regain it... if it ever returns!

IMO, you're waaaay to young to be sticking with this guy. You really need to get out and experience the world at your age, and stop living in a fish bowl with this boyfriend.
He's cheated on you (not surprising. He's trying to experience the world himself.)

You need to surround yourself with some new friends, new experiences... there's life beyond this boyfriend. You need a change of scenery.

I have the feeling your retired military dad didn't approve of your being with this guy, and since you wanted to stay with your boyfriend, your dad moved on.
More than likely, he saw all this coming: the guy cheating on you, you 2 geting into arguments everday and so on. You, being young, didn't want to hear it and stayed with this guy thinking your dad didn't know what he was talking about.
Most teens/young adults do this.

It's actually time for you to get up, get out of that live-with-my-boyfriend situation and be independent.
Support yourself, because as long as you're with this guy--no matter how many promises of being faithful to you he makes-- he'll cheat again. Everything is new to him, and it's like a buffet for him.
You ever go to a buffet table? You can choose from all kinds of meats, breads, veggies and dishes... and it's openly available to you!

Well that's what it's like for your boyfriend.

The best thing you can do is live your OWN life apart from this guy.
You lived for 16 years without this boyfriend and you certainly weren't joined at the hip with him; so therefore, you can get a life without him, because he sure can live without you.

You're kidding, right?

You actually wanna stay with him? You can't be serious.

Well I know you really love this guy and I think it was good that he was being honest and told you and he didnt hide it from you or else it wouldve been worse and I mean if he was able to tell you the truth then maybe he might do the same if he does something and plus if he REALLY loves you and wants to regain that trust then dont you think he should "work" for it? like regain that trust back? You should talk to him about that myspace stuff i mean if you dont like it and if he wants to make the relationship work then maybe he should take delete the myspace or do something to make you feel better. I think that when two people love each other they would do anything to make the relationship better! * SO dont feel bad for feeling like you cant trust him. *Without trust there is no relationship*