Never felt like this before

I've been seeing this guy for a few months now and i dunno what it is about him, he has this hold over me, or spell haha, who knows.
I've never felt this way before over a guy at least I dont think I have, I get butterflies  whenever I go to see him, I think that's kinda nice, to me he's practically perfect.
The list is endless  of what I love about him, and i dont just mean looks, I forgot how much I love a tall guy, he has amazing eyes and a great smile, his laugh is lovely,  I love his arms and im sure he also knows that,  his voice is just to die for.
He has an amazing personality ,he loves animals and has  such a kind heart i mean he gave me flowers ..on his birthday I just want to know more about him all the time, I'm very infatuated by him  but I'm at a point of insecurity, and I think If I don't get a hold of myself. I'm gonna lose him.. maybe it's guilt of the fact that I ended the last two relationships I'm now scared it's going to happen to me, I don't want to get hurt, I've not let down my wall completely yet..It may take a bit of time but  I'll get there.