Aries girl needs help with Leo Guy

Ok so I've been kind of seeing this Leo guy for about a year now, when I say kind of seeing I mean none of us have established that we have a boyfriend/girlfriend relationship, but we have both made it clear that we both have feelings for each other. Only problem is he has a serious girlfriend of 3 years and recently just had a baby, he has always tried to hide the fact that he has this girlfriend but I found out soon after we started seeing each other, but still carried on with him (dumb I know). Anyways I never know quite what to think with this guy I've read up quite alot on leo and aries pairings and they all seem to be quite dynamic and have this strong attraction towards each other, which I think we do have a strong attraction but he confuses me he would go cold for a couple of days sometimes weeks, and me being an Aries I want his full attention so I threaten to leave him and then he comes on strong trying to prevent a break up, and he gets really jealous when I get attention from other guys. Anyways long story short I got a boyfriend as I didn't find it fair that I was giving it my all with the leo guy while he was playing happy families but I really wana get this guys full attention. I have tried to delete his number multiple times, but we always end up back together, I don't know if he's using me or he genuinely doesnt want to let me go??

SweetLibra is right. You need to know that men get possessive of women they sleep with. It doesn't mean we love you.
Him getting jealous of other men and not wanting to break off with a mistress is just possessiveness and selfish ego games.
The only person he loves is himself and hopefully his child.