Yes, you can still love a person and even marry them if the sex is BAD...It depends on how important sex is to you and him...Is he aware...that sex is bad...? does he care? If you are in your 60,70 or 80's...sex may not be as important...As we age our sex drive often fades....Its the other elements of a marriage that take over and make it satisfying...Communication about this issue is the most important thing..don't make it a secret........Good luck...