Who do I pick? The untrustworthy boyfriend, the new crush or the guy I've always loved?

I got back together with my ex whom I don't love. I only said yes to date him again out of loneliness. He is still the same guy which means too confident and untrustworthy.

The problem is that I'm also in love with another guy who already has a girlfriend

Not to forget my previous crush whom I still love but have made a pact on not to date. Though I really want to be with him. I don't like to rub my relationship with my boyfriend in his face or hurt him because I think he still likes me a little bit.

What do I do?
Should I break up with my boyfriend?
And if then forget the pact I made towards the guy I really love?
And what about my current crush?

I'm a bit of a mess so I really hope you can help me!