Left Unsatisfied...

My hubby and I have been married for two years. I feel like I'm broken because I do not find any enjoyment in sex. He finishes in less than 2 minutes, and I have never, ever finished. We mostly do missionary, but occasionally do doggy, and it feels nice for a little while I guess, but it doesn't escalate. So we just stop because he gets tired and it's not doing anything for me anyway.

What are we doing wrong?? I feel like I should enjoy it more, but right now I could definitely live without it.