I've had a few experiences which caused me to adapt and evolve but the biggest relationship wise was with my ex. From the beginning i noted some red flags from her but she grew on me and eventually after like 7 months i made it official. when we made it official we also agreed she had to cut contact with one dude she had a one night stand with who she kept in contact with from long distance (international). She did. To keep this short i noticed her behavior changing at a point(2 years later) and suspected some shyt just in my gut. We always chilled at the apartment with all her girlfriends and me being the only guy i spent a lot of time on the computer, which was her laptop. This was never a problem before but this time she kept acting funny and weird taking it away and closing it which drew my suspicions. I checked her browser history and found fb chats with the same dude and visiting his page like 100 times, also found skype shyt.. I flung her computer and broke up with her. She actually tried to act like i was over reacting but i could see the guilt on her face and she later admitted what she did. She didn't hook up with him at the time but down the line she visited him and did, so i was right to get out early. That's much later but immediately following the break up i didnt contact her for a few weeks but she contacted me and we ended up hooking up again and later when i tried to get close she kept saying she only wants sex. This eventually changed though and she wanted to get closer again. During this time i had another girl on deck that i was cool with by the way(friends for years, had mutual attraction but always in relationships). I also want to remind you that i looked out for my ex in every way possible (money, fighting dudes, travel, countless shyt) before i tell you what happens next. I ended up getting in a motorcycle accident and my ex didn't bother to come see me once, we both live in nyc. I'm a big gym and martial arts guy and i couldn't even do that for the first time, i went for a run and tears rolled down my eyes it hurt so bad. I couldn't go to class and refused to tell my family. It hurt so bad i was literally scared to have to get up to use the bathroom. One day i finally mustered up all my strength to go to class and i passed the one chick i was cool with and she blew me off even after i told her what happened (guess she found a new dude at the moment). Eventually i forced myself to train and gym again and miraculously i'm fully healed and stronger than i ever was physically and mentally. Two friends looked out for me during this time, both male. Just helped bring food and give rides here and there.
So that's my main story but i've had other girls do me dirty. Never this bad though.