I am so upset!

I’ve been dating this guy for a couple months. We’ve been out on multiple dates. We really seemed like a great match. We talk every single day and we both really liked each other (atleast I thought) We planned for him to come stay the night tonight and we were both excited. He’s been here for about an hour and we had sex for the first time. As soon as we were finished he went to the restroom and then I went to the restroom. When I came out he said “sorry I have to go. It’s not you it’s me” and just left.. I didn’t know what to say so I just said okay

I just really feel like crying