We've been together for almost a year, we see each other maybe twice a week and have sex consistently... I feel quite bad about it but I don't think I've done a good job helping her reach orgasm. A few times she has said that she thinks she came however, I feel like you shouldn't "think," rather you should know.

I know that she digs it when I eat her out and finger her but she usually wants me to grab a condom after it starts getting it good. She enjoys the sex and kissing stuff too but I suppose not enough to orgasm. Any advice?