Why did he say to me that he was nervous?

Recently, I was hooking up with this guy for the third time. He came over my place. He mentioned he was nervous and he had wine. I told him I missed him and he said I missed you too. We had a deep convo about his depression he’s going through. I told him that I was there for him. Then we had rough but sensual sex in the bedroom. After sex we fell asleep and woke up together exhausted. He told me that was a lot of fun. He since then has been distant. He did tell me he has a hard time dealing with emotions. Why would he say he is nervous?
Why did he say to me that he was nervous?
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