Is this sexual harassment?

A long time ago, I got with this guy. However, it didn't happen as easy at it sounds. He'd got me alone and tried to kiss me, which I told him no. He was still really persistent and he kept trying to convince him to kiss him. (I did want too but I didn't at the same time for other reasons hence why I said no). I continued to say no and that was that. Anyways, later on in the night, he comes into the room I was in, and he keeps trying to kiss me and although I found him incredibly attractive and I'd always liked him like that, there were reasons I couldn't, and I did keep saying no. I think I said no at least a hundred times before he had finally turned me on and I'd given in. He had turned me on by touching me in certain areas even though I had said no to him kissing me. He was so so so persistent! I know I gave in and I shouldn't have, but I just can't help to think of all the times I had said no? Why couldn't it be as easy as me saying no and him just leaving and accepting that? When I gave in, obviously I enjoyed it, but now I simply regret it so much and wish I had stuck to saying no and not giving in. Is this any form of sexual harassment, I just need to know. Or is this normal and it's a girl giving in to her sexual wants even though she didn't want too? Is it just as my fault as his?