Is this healthy/normal in a relationship?

I have been with my partner for just over 2 years... we had quite a turbulent time of it from the beginning due to each of us having our own 'issues' to address.. in recent months it felt like we were going through a real honeymoon period again which was lovely, but now things have calmed down a bit, it feels like we are perhaps a bit too comfortable... i don't have much of a sex drive atm and he is working alot so he doesn't either... it freaks me out tho when we don't have sex very much as i feel like we are not being very in to eachother or something... he says not to worry and its just normal and its not all about sex, which is true, but I know having more sex can bring u closer together.. The other thing i find dificult is that we are quite different in some respects - mostly social. I like to go out sometimes, have a few drinks, a bit of a laugh, he's a bit more of a homely boy (smoker!) so isnt so interested.. Mostly thats ok but sometimes I wish he was more interested in hanging out with me and my friends. Sounds a bit silly and immature maybe (I am 30!) but I just worry that on some levels we don't have enough in common.. however in the home we do get on well.. and i can see us doing very well as a family unit, but feel like we don't have kids yet, so it would be nice to do a few more fun things together... he just isnt particuarly interested tho. I feel like a bit of an **** cos on some levels he is a great boyfriend, treats me very well etc etc but i guess if im completely truthful I find him a little boring sometimes, and i feel terrible for feeling like that... is it normal to have different aspects of ur partner that u do and dont like? I spose i find it a bit weird that sometimes i feel totally in love with him and other times he just kind of annoys/bores me... not sure how good that is... any opinions/advice would be much appreciated. thanks