Too comfortable to have sex with my husband?

Ok, this is really really strange and I’m not sure what to do.

I used to have a really high sex drive. I lost my virginity to my high school boyfriend when I was 16, and even after we broke up I honestly never went more than a month or so without sex (between relationships and friends with benefits I really just ended up having sex a lot). I met my husband when I was 19, and for the first like... 18 months of our relationship, we had sex probably twice a week if not more.

Then I feel like my sex drive just dropped, slowly, steadily. I was 21 years old when this started happening so like, still very young? We got engaged and married since then. We probably have sex about twice a month at this point. My husband says he’s fine with it, but I know he’s not. And IM not.

I want to want to have sex. I’ll sit at work all day and think oh my god yes, we’re going to have sex tonight. I want to have sex tonight. And then the time comes and I’m just so... not in the mood?

I feel like I’m almost embarrassed. Embarrassed to admit that I want it. Embarrassed to act horny. Embarrassed to act turned on. It’s not that I’m not comfortable enough with my husband...... because we used to have crazy passionate sex but suddenly I feel weird about doing that. I feel like I’m embarrassed to get too into it. Actually almost like we are too close and I’m TOO comfortable with him...? Not to sound too gross but, it honestly feels like if I were to act like that to my best friend, or even a brother or a cousin or something... I feel like my love for him has reached the level of how much I love family (which, of course he is “family”, because he’s my husband) but that actually seems to be detrimental to our sex life.

The one exception to this was our honeymoon. We had sex at least every other day, sometimes more than once a day. More in that one week than in the past 6 months. Seriously. I thought maybe we were past this weird sex-less phase, but now that we’re home again, nope.

I am still VERY attracted to him. I want to have sex with him. I just feel embarrassed to act... sexy? To him?

Help :(