I think you need to calm down and think about it all. DO you still have feelings for your ex? Put aside all the guilt and sadness for him, we both know that's not a good basis for a relationship. Do you still love him? Or do you think that you shouldn't be in a relationship with him cause you DON'T love him?

As for your current bf, I think he has his own issues. He doesn't seem to care for you very much, but of course, that's only from what I see in this post. You yourself know better. Do you love him? Or do you still have feelings for your ex?

If you have feelings for both guys, I suggest you start working on that "indecisiveness" asap, it's not fair to either of them nor you. Remember, just cause your ex was a great guy, doesn't mean you HAVE to be with him. You're still young, and if you don't love him, tell him the truth. That's also a form of respect to him, and it's not fair for you to lead him on if you get with him. You're doing the right thing. I assure you.

I also felt the same way last time about a great guy I dated. I wasn't ready either and I cut him off before it got messy.