Sexting help? Relationship help? Just help in general

Around five yesterday while texting my boyfriend I sent him some pretty sexual texts. I was really in a mood haha and around 8 after not hearing I sent more, just sending him what I want him to do to me in a couple texts every hour until 12 when I went to bed. I was really excited to hear from him the next day what he thought.

I wake up at 10 ish and check my phone to see he had read everything and hadn’t replied, and at 8:22 pm he STILL hasn’t replied.

I’m scared he doesn’t like what I said, and also because lately he’s talked to me less and less and has started saying he’s just “too busy” for me. We’ve been together two years and I feel like he’s just not into me anymore. I know he works mornings and has night classes, but classes where canceled yesterday, so where the hell was he? I can’t even talk to him about anything because even if I reply ASAP it’ll be hours or days before I hear from him.