A 'thing' for other women...

So basically when I was younger I had a girlfriend, but at the time I wanted to be with a man. But now I'm 26 and been in a relationship with a guy for 7 years the last couple of months all I think about is women. Like thinking of that is the only thing that 'gets me off' lol. I don't feel turned on unless I think of a girl? I want to say to my partner about this but don't want him to make him feel shit? Oh I don't know I'm so confused Lol!!! ** he knows all about my previous relationship with a girl etc and has joked about me getting with another girl with him here**

We were talking about porn the other night and I said the only porn that does anything for me is girls. He just laughed and that's when he said ' you should get with another girl & I'll be there 2' I just laughed with him but don't want to bring it up again in case he was actually only joking Lol.