Ok, this is my first time posting here and I felt I needed to post this predicament/question here rather than in AskSeddit. My problem is oneitis, I know a lot of people have experienced this or will know about it so I am coming here for help.

Sometimes when I meet a girl or see a girl who is hot or good looking I will sort of develop feelings for her, typical oneitis. I might become obsessed (not on a stalker level or anything, im not crazy) and think about her, like i have a crush. After a week or so I would lose interest and my 'crush' on them would be instantly gone. I never cared too much for this as it would happen with random girls I didnt care for much and I didnt really know or like them at all.

Now here's where I have a problem. (I know I shouldn't post about one specific girl but I have to use this situation as an example) There is a girl I geniunely like, a lot. I was planning to make a move on her and ask her out but now I dont have the same feelings for her. I dont get that warm feeling in my stomach when I think about her....

HOW am I meant to stay in a relationship with a girl if I might just lose interest after a short period of time, I dont want to cycle through girls week after week because I got bored of them,..

Please if anyone can help I appreciate it a lot