Ok so me and this guy known each other for a while and we talk as friends and never knew we actually liked each other more than friends but like a year later we still talk to each other but now he had actually got my number and I just found out recently that he has a girlfriend but one night we just started telling each other how we liked each other for a long time but neve really told each other so now were both regretting it . But the thing is we both want to stop texting and liking each other but we can't because it gotten stronger so what do I do? He said we just going to have to wait and see where it goes.. but should I wait or should I leave it alone ?

Don't hang yourself up on this guy. Stop contacting him and move on. If anything more ends up happening great, but there's no sense on sitting around waiting for something that may never be.