I Just Don't Know What To Do...

I'm in such a difficult situation. I don't know how I dig myself into these ditches. I have a bf, but he is trippin' and slackin on his game. My ex has stepped up to the plate and is doing for me what my bf is not. I want to feel guilty about the situation because it is so complicated. My bf claims that I am the first girl he has ever loved, but he is not showing me his love, he says he doesn't want to force anything upon me, which I completely understand. At the same time, we have moved nowhere in our relationship, we have daily arguments, which have died down a little (considering the fact that we don't talk everyday now). I'm feeling all discombobulated about the situation... While on the other hand my ex has called me and has given me his shoulder to lean on. Crazy thing is he and I have broken up twice already. It's just so much to deal with right now, I don't know exactly how I should feel.