I am 21 years of age and am currently in a relationship and have been with each other for a little over 3 years. The only thing is, he is 18 years older, but he looks and acts like hes in his 20's. When times are good they are GOOD, but when times are bad they are BAD. So I have never gave someone my all, but with him I do. While trusting him completely and giving him my whole heart, I find out that he was talking to another female and not just one night, they were talking for like 6 months to a year. I don't think they have had sex or anything like that, but sending pictures to someone else is still considered cheating in my book; same as if you are messaging someone and you have to delete messages then obviously you are doing something you shouldn't be. So even after this whole situation I saw he was talking to the same girl again plus like two more. Anyways my point is he is a sex addict and I am not. The first year an a half maybe our sex drive for each other was amazing, but now, I never think about sex, I am never really in the mood for sex, and most the time I just have to force myself....But him on the other hand always wants to have sex, like at least 5 times a day. Or if it is not sex for some reason within the last year he is so obsessed with oral sex. I swear he asks me to perform oral sex at least (no exaggeration) 10 or more times a day. And then if he doesn't receive it then he gets all depressed and will just stay to himself like I am not even there, or he gets really moody.
How come I am never interested in having sex, especially since I am 21 years of age. Shouldn't I be more interested? Can the past effect my sex drive with him? What's wrong with me???