Who to love?

Amber
So, my ex-boyfriend and I broke up nine months ago, due the fact that he couldn't handle me whenever I'm at my lowest. I suffer from bipolar disorder and anxiety attacks, and he just couldn't handle me and decided to break up with me. He then decided he didn't want any contact and blocked me on every app possible. 
I was heartbroken for six months or so, I finally got over it and on the first of April I met someone new. A very loving guy, caring and accepting. We're still not in a relationship though, and I don't know why. I don't know if it's because he doesn't like me as much as I like him, or if he's worried we might not be a match. It's making me doubt our future at a whole. I've tried to talk about it quite some times, and even though we've had conversations about it we never came to an answer. 
Recently, like two days ago, my ex boyfriend contacted me. I later hung out with him, wanting to know what he exactly was going to say. He told me he missed me and still loved me, which I suposse I do too. 
I'm so confused right now, because I genuinely like that new guy, but I do still love my ex, or so I think. What seems like the right decision?