Pisces trying to get a Libra off her mind?

Sooo I've liked this Libra guy since basically the first time I saw him. But the problem was that I was dating his friend. My past bf and I had a good connection in the sense of liking each other and getting along, but this Libra blew me away with his intellect, creativity, and depth.

A lot of times it felt like we had this weird mental connection of liking the same stuff, having the same tastes, discussing things for a long time. I never experienced that with the guy I was with.. it was a pretty shallow relationship where I was doing the initiating in almost everything.

So my ex and I broke up mutually, I'd say 60% him and 40% me. I knew it was the right thing to do, and told him I felt empty being with him, when the reality was, I was in love with his friend. And couldn't stand to fake a relationship anymore.

My question is.. I know it might be wrong for us to ever initiate anything considering the circumstances.. But how do I stop thinking about him? I can't get him off my mind. I know everyone says not to pick a situation that could cause drama, over the millions of other guys out there. But every time I like a new guy, I find myself comparing them to this one. Any tips on how to stop myself from going there mentally/emotionally? I really wanna move on since it won't go anywhere.