'We shouldn't date...' (PLEASE HELP!)

I've known this guy for just over a year now (we're friends) and don't get me wrong, he's a nice guy but gradually I've noticed that he has big feelings for me.

A little while back he actually admitted it and it wasn't until a couple days ago he asked me out on a date. But, I haven't given a proper reply back because I don't have any 'feelings' for him, I'm not attracted in anyway.

I feel bad saying no, because that's the type of person I am and would usually give into him :( But recently I've been viewing what I WANT not what other people WANT. And dating him..I don't think I could do that.

What should I do lovelies? How could I say this to him without ruining him completely? Thank you 💗