Be more selective who you date and why you date them. So most of the above problems will solve themselves. You can't be seriously interested in more than a few girls at a time.
So what do you really want? A serious relationship with mrs right? Then become more selective, become more choosey with your time, money and energy. You sending out the wrong vibes while chasing glitter!
You don't have to date mire than a few times to see if you want to continue the persue or not - you guys know from date 1 if she is a game changer or not. Don't entertain time wasters