A girl said she loved me once and doted on me. Then, because she wouldn't let me have sex with her (because she was religious - and wanted a husband, SICK) she started having lustful feelings towards other men and abandoned me!
So I learned to make the most of a girl while she still likes you!
My life's experience has been that women will always abandon me - sometimes from the very start, sometimes after teasing me for a little while first.

I don't know if you realize the inherent conflict in your statement. You must have meant something else...regardless....it is the errant conclusion you have established as your policy in future relationships that really needs to be looked at. I don't know your age...but you sound very young. You somehow equate sex with love. Perhaps those women were looking for love and left (and rightfully so) when they realized all you wanted from them was sex .
When you experience true love for the first time...it will change your life forever. Even the best love stories in the movies cannot capture the indescribable beauty of life forever after you have experienced true love. As good as sex can be....it is nothing in comparison to love. To chase sex as an end is to squander opportunity to find love. With love...sex becomes something that is giving...you wish to please your partner out of love and caring...not to selfishly take only.
Get yourself the greatest love story in cinema...watch it...realize that it is even better in real life...make that one of your goals. True love...not mere shallow sex as an end.