HELP ME AM I CRAZY!?!?!?

Ok so I'm going through a breakup (two weeks down and forever to go), and I've been trying to occupy my mind.. going out, having fun, getting dolled up, posting bomb ass selfies, the usual post breakup routine. So there's this guy who's been hanging around me like a lost puppy for years now since my first boyfriend (he was like my first boyfriends little bro) and he's madly in like with me he wants to treat me like a queen! He knows I've been broken so many times and he only wants to put me back together... Only problem is... after all these years of heartbreak from other guys.... I feel absolutely nothing for this kid even though anyone else would consider him a great catch i just don't want him, and I'm sooo frustrated because I feel like I should be jumping for joy that someone wants to worship the ground I walk on but I don't and all I can ever think about when I talk to him is "why couldn't my ex have been like this guy?" I'm so annoyed and I need help I wanna be happy for once in my life am I the only one standing in the way of that?