Dude- Hey I'm sorry your heart was broke- but seriously dude- just as many men out in the real world use women up and leave them as well. The games men and women play using sex as a bargaining tool never ends. Some people use sex as a weapon to bash someone's brains apart ( emotionally ) - some people honestly have sex because they actually love and care for the person they are having sex with.
Just because a good number of ladies might be nice to you- doesn't mean they want sex with you- they may just actually want friendship without the balls hanging and croaking , spurting lizard my friend . As you get older and more experienced with female relationships I believe you'll understand that more so.
I had my heart broken several times as a younger man. NOW I'm in my 50's and a lot smarter regarding relationships- finally found a lady over 10 years ago who I clicked with. You'll find it too, just look at the shit you go through as learning experiences and you'll gradually get closer to what you want. Good luck, peace out, MR. Flipper