having a new relationship AFTER A BREAK UP WITH THE PREVIOUS RELATIONSHIP

I dont understand what you're trying to say. You dont want to fall in love but you know you love her? Having a relationship after a break up isnt wrong unless you are using her to make you feel better for your past relationship. Its wrong if your in it for your own betterment and not because you care for the other person. Its wrong if you are still in love with your ex girlfriend yet you are in a relationship with this new girlfriend. I think you can call your situation a rebound relationship and it has always been known its not good until your completely healed and have completely moved on from your past.