Why would you steal in the first place. You have violated the trust he had in you.
In situations like this, I try to feel and think what is going on in the other person's mind.
Like if I stole from you how would you feel. Their would be a sense of betrayal and your trust in me would go out the window for at least awhile.
Can you now see what kind of mess this is turning into. I cannot emphasize enough that you need to return what you have stolen. Where you go from their I cannot tell you. All I can say is if you lose your boyfriend because of this, you have no one to blame but your self.