Marry someone you like. Not just someone you love. Like is actually more important and much more powerful than love. Like is what makes a relationship withstand the test of time. Do you like being with the person, just hanging out doing nothing?
If you aren't having sex with your husband and yet your medication list at the pharmacy (or on your health insurance records) indicates that your spouse is taking erectile dysfunction pills such as Viagra, chances are he may be cheating.