Sex with boyfriend

So as of recently (approx a month ago) My sex drive hasn't been so high. My boyfriend is complaining that I haven't initiated anything for a long time. We had sex like 6 times one day lol but it hasn't been consistent. I just don't feel like having sex, I just want to hang out and be with him and if things happen then they happen. Maybe it's because I took him for granted ? We have been together for three years. We always had great sex and consistent sex. Now he's insecure and he thinks he doesn't please me. Mind you he's a very horny guy . I just don't want him to look elsewhere because I'm not giving it to him all the time.