I was once in this situation where me and my best friend were going after the same girl, he thought he could win her over by being nice to her and i was just a dick and didnt act interested, me and her hooked up all the time, i always knew she liked my friend more, but she knew he would always be there, but she knew if she went for him that i would just forget about it.
overall being a dick will get you laid, but never a good relationship, but i couldnt give two sh!ts about a relationship.