Why is it every time I almost get a girl to be my girlfriend something (the exact same thing) happens?

incepter123
OK so my past 3 attempts to get a girlfriend have been almost successful, and they ended the same ways. It would be were I started talking to them, they reciprocated (said they liked me) then a day or two after there would say that they like somebody else and go with them and leave me in the dust. So the first one was a girl I had my eye on relatively a while and I started to talk to her and her two guy friends, were like "dude she likes you" and I knew this, but I needed confirmation, but she said she liked me a lot but she also liked this other kid who virtually didn't like her and was unobtainable, and I kinda helped her get over him and choose me, and, then after that she went with one of the guy friends, and they're in a relationship currently. So fml there. Then another girl, who was apparently was the best friend of the girl I went after before, same story except, she said "you can like more than one person" to me, and apparently someone else liked her. Then there was another girl, she came up to me to tell me that her friend liked me (which I kinda knew but I liked her better) and I told her, then a half an hour later, she asks for my number. Then its all good, I am practically in a relationship with her aaaand apparently she was told by a good friend of hers that he likes her, and she inevitably said "I don't want to break anybody's heart" even though the both of us were chill with whoever she went with. So my status with these girls are: the first one; friends, kinda think she still likes me. But not too sure. 2nd: avoids me doesn't reply to texts, when I try to talk to her in person ignores me (her friend told me she's just judgemental) and the 3rd I don't know, I have to talk to her. But just for clarification, I had compatibility with all these girls (that's not me just saying that) and they liked me, so what happened?
Updates
+1 y
OK, so note, all these girls except the 2nd liked me first.
Why is it every time I almost get a girl to be my girlfriend something (the exact same thing) happens?
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