Am I dumb?

If you have the feeling that you shouldn't be with him. Trust it.

If what he says about trying this time is different from other times, maybe just one more try wouldn't hurt. What do you have to lose? You could decide on a good compromise that could save your relationship. If this last try doesn't work out though, it's probably best to trust your gut and move on. We aren't always compatible with people, even if we love them. There will be time where you have to accept that, and this may be one of those times. If you decide for one more try, Be honest. Lay your cards on the table and tell him to also. I hope this helps. Good luck.

Whether you put yourself back in that situation again is your choice. You just have to make sure that you set your limits and stick to them. Or you will always be the girl that goes back and you will always be the one hurt.

I don't think you'd be dumb, I'm just not sure it would be the wisest decision considering what you've shared here. It just sounds like a very unstable relationship. Do you really want that? Better to have someone you can truly count on in my opinion. Not someone who is going to leave you to wonder. Maybe you do love him but I'm not convinced he loves you no matter what he says.

It's a choice that comes down to you in the end, wether you feel like it's the right thing to do or not. But consider all the consequences before you decide on anything. Like the fact that he's cheated on you before, what say's he wont do it again? I'm sorry to say this but people who have cheated before are likely do do it more than once. And also, the reason for why you broke up is still there. And it may very well be the thing that ends it again.

Also, decide what's the best thing for you. Don't change yourself or your values for someone else. Know what you're getting yourself into.