Losing faith in relationship.

Katie
I need advice. I have been in a relationship for almost 5 years and still not engaged (I'm 24 he's 25). Things were rocky for a long time. But now Things have been great for over a year. He rarely talks about marriage or kids. We rarely have sex and he is not affectionate AT ALL. I have told him before that I need affection and I am tired of going to him for sex. Someone help! I don't know what to do anymore. I'm afraid it will be like this forever and I feel like I'm "settling" for the way things are.