How do u kno if you have a overactive sex drive?

Ask this question- Is it bothering you or your partner(s) in any fashion? If so it may then be a problem, especially if it interferes with yours or their functioning or sense of well being.
How it affects you. The important thing in deciding if you are over-active is if it is interfering in your life or in your partners' lives. If your desire for affection or intimacy is preventing you from feeling positive about yourself or your relationships, you need to consider why that is. It may be that you put too much emphasis on sex or it may be that you a relationship problem to consider.
Enough? It really depends on whether your sex drive more or less matches your partner's.