-about 3 weeks ago, I put my foot down about a sexual boundary. We had an argument about it, but he told me he had no choice but to accept it.

-He wants me to lick/suck his testicles during oral sex, but I have never liked doing that, as it was always gross to me. That is probably the only sexual restriction I have.

-ever since then he has been less physically affectionate and won't initiate sex like he used to because there are “too many restrictions” and he “doesn't want to risk being told no.”

-We went from sex multiple times a week, to once a week, and I have to initiate now.

-I asked him about this emotional distance and he insists that I am being absurd. I told him he could tell me if he was unhappy and he INSISTS that he would.

-He hasnt taken me out on a date since the night of the argument 3 weeks ago. We used to have a standing date night every Friday night. For the past 3 weekends, he has been on “out-of-town” trips or hanging out with his family/brothers.

Is he losing interest, or is the honeymoon period just over?

He's very close with his half brother, and when they had an argument about a month ago, my bf was hanging out with me ALOT. No complaints, but now that they are back on speaking terms, every weekend, he is doing something with his brothers (tailgating, driving back home to see family, going out drinking, etc.)

Should I be worried or does he just need some space? This weekend he will be away again. He showed me a text earlier in the week of his brother asking him for a favor over the weekend.