How often should you have sex in a relationship?

Lisa

I’ve been dating a guy for over 6 months now. While we have been sexually active, we don’t have sex very often. It literally ranges from once to none at all. It’s mostly on me...I just don’t be feeling like having sex sometimes and he’s really understanding but I feel bad. I think I have low sex drive or something. How often should you have sex with your significant other?