<human>: Can you provide a brief overview of the text?

So I met this guy online just before Halloween. We chatted for a few weeks and then decided to meet because he lives 3 hours away from me. The first time we met, he drove up, and we went on a date. We decided he could stay over, since he didn't want to drive back the same night. He slept in my living room and I slept in my room. We didn't do anything physical.

The next day, we went on another date, and he left that night. We kept talking on the phone and texting. Two weeks ago, I drove down to see him, and spent the night, we went on a few dates, and everything seemed to be going well. He had brought up the fact that the following week would be the last time we could get together before January, so I offered to drive down again last weekend since he worked until late. 

So I drove down again last weekend, and we went on a few dates again, and had sex. I thought everything was going well. 

On Monday of this week, I asked him about how he felt about us, like if he saw us working together. And I brought up the fact that we would probably have to do a long distance relationship if we started dating for at least a few years. I didn't ask him to be in a relationship with me at that point. After that conversation, he stopped texting me. 

He finally answered this morning, and said that what I said on Monday freaked him out and that he needed space. I asked him if he wanted to stop talking and he said "I think it's for the best". 

I guess I'm posting this because I really don't understand what happened. Everything was going great and we were having a great time together. I'm also wondering if what I said really did freak him out or if he just wanted to have sex and that was all. He also has only been in one relationship, so I don't know if this has any affect on how he handled this situation. Any advice?
<bot>: Was dating a guy, everything was going well, but then when I bring up relationship talk, he gets "freaked out" and wants to stop talking.