They just said they want a boyfriend...

They just said they want a boyfriend but when I was here he didn't, it's like this everytime, they fuck with someone for a week or two, it doesn't work out and then they come back to flirt with me like it's that easy, and it is, but not for me, I already told them I liked them, for over 7 months, but they only feel something back when it's convenient, when there's not someone better, when there's no one so I'm enough, they come back, only to leave me again, and I know it, I know, but it still hurts, and I can't stop it because they're still my friend.