guys...what would you do if...

Since Im a girl, if my boyfriend said that to me, sure I'll be hurt. But most important that means although he once cheated or have other girlfriend aside of me, that means that in the end he chooses to stay with me and stay faithful because by telling me something like that it shows that he cares and wants to open up and share everything to me even if its already in the past. He must know that by saying that to me he is risking that I may dump him immediately, I may hate him or whatever, but instead he still revealed it and try to be honest with me and start over. He prefer that I get angry with him and then he can start new days with me, rather than I didnt know anything and stay nice to him, but he is living in lie :) So I guess, though I'll be hurt, and I would be very wary to trust him again, I will still try and try until I can to trust him again of course he also needs to prove himself trustworthy to me :)