My boyfriend has been emailing, texting, talking to other girls escorts and trans on and off for the 2 years we have been together. He says it was just the way he has always been, it's just for fun, he has never been physical with anyone since we have been together ( I know this is true because we are always together) but it seems it could go further in the future since he keeps pursuing it right ? And he lies to me about it, he has promised and even signed a contract that he won't do it again but he can't seem to help himself. He says he only wants to be with me and grow old with me but he has a very high sex drive and this is all entertainment to him.
My rational mind says this is no good, disrespectful, hurtful, betrayal.. My hearts says I love him, he loves me, he is struggling with this possibly as a result of childhood abuse, and that I should be understanding and try to help him. But honestly I don't deserve to be treated this way, I am young, attractive, quite an amazing catch really, totally faithful, honest and loyal to him, we have great sex, yet he is going behind my back to get attention from 2's when I am at least an 8 ! The lying to my face is really the worst of it all.. What to do please ?

What good and healthy relationship needs a contract?

I've never understood why some guys find trans to be desirable. It just seems to weird for me, but that is just me.

Except for the lying, how is this being disrespectful to you ?

Most likely he lied, since you would not accept and let him do it, so after a long argument or constant he just told you want you wanted to hear and figured perhaps you would not catch it, or at least if you did, the fight would be off for a while.

And sign a contract ? If this was not just stupid, I would be laughing. So there is no trust, thus no relationship.

Do I think it will go further, NO, if it was it would have by now.

Is this strange in my opinion, yes, but it is his fetish and it is not my place to judge him.

He should have told you about it in the beginning. If he did, then it is on you, since you knew about it.