Need advice: Am I getting dumped?

Update: I flat out asked him to be honest with me and tell me if he’s no longer interested. Turns out he’s hung up on another girl. I feel so used. I should have never slept with him.

So I just starting seeing this guy and we’ve been out some great dates. We ended up sleeping together. I thought everything was fine but now his texts are more sporadic but he still responds. He mentioned this week is busy for him as he is a graduate student. We talked about another date and he asked for me to make plan. I did but he shot my idea down. In my plans, I mentioned booking a hotel as his roommate was having guests over. He said it sounded fun but suggested we save money and go for a walk around the city. The issue is that he left it vague. Is he going to dump me?