What to do - partner doesn't have sex with me

I have a wonderful life and relationship, a lovely house, a baby on the way and a kind and supportive partner that is cuddly and kisses me lots. We do fun things together and we're best friends, but he doesn't really have sex with me.

I've spoken to him about it lots and he just says he's tired and doesn't have a big sex drive, but I also know he watches porn a few times a week.

It's been like this for over a year. The only times we have sex is when I initiate it and even then my partner often acts like it's a chore, and then gets it over and done with as quick as possible. It's a couple of minutes about twice a month. I don't orgasm. I always let him know how much I love him and having sex with him though.

I really love my partner and I don't want to leave him or the life we have together but no matter how much I try to talk to him about how I'd like to have sex more or have him initiate it, nothing changes. I'm not sexually satisfied and I don't feel desired by him. I'm 32, slim, tall, well dressed, fairly attractive I think. I'm also nice to him and we have fun together. Our relationship is good in all the other parts.

I'm not sure what else I can do. Does anybody have any advice or ideas?