Un-wholesome Family?

I have been with my boyfriend for a long time now and we are planning on getting married. The thing is, I can not stop having doubts because of his family. My boyfriend is AMAZING. He is so sweet and kind, hard working, and would do anything for m. People are always telling me how lucky I am. He is quite a bit different from his family. He grew up with parents who had kids very young and didn't graduate high school, they are a litle "rougher" around the edges, always loud, cursing, etc. Don't get me wrong, they are very nice people and I get along well with them, but they are not exactly the type of wholesome family I always envisioned being married into. They are there for me if I ever need anything, but form the outside are not what I envisioned; always in sweatpants and scruffy clothes. I worry what my friends will think if they meet them. Can some people give me some of their thoughts? I do have OCD, so I am known to obsess about things entirely too much.