Another position that I suggest is to put her legs on your shoulder. It is like a variation to the missionary. This way you still can see each other.

There is nothing wrong being short chris. Unless you are a gigolo, sex is only a part of a relationship. And there are something else that is far more important in the relationship. Oh one more thing, intercourse is only a part of sex too. There are foreplays, oral sexes, touching, kissing etc that involved in sex. So you are worrying only a minor part of a minor thing in relationship. Relax.