Friendships can be so complicated.

One of my ex-boyfriends happens to be one of my best friends. Strange in a way I suppose. And trust me, it's not easy. We still fight and argue and get mad at each other. But when push comes to shove, we always do what we can to help each other. I need his help with something. He is the only one I know who can help with this. Yet, I'm scared. Because I know the reasoning why I need it will cause problems. Possibly more than I'm able to handle right now. But I can't continue this either. Wtf do I do?