How would you react?

This guy's someone I often meet at the library. We got along well and I agreed to go out with him. Anyway, it went a lot better than expected, on the first date itself, he raised the topic of marriage and kept saying he'd like to meet my family. I felt really comfortable around him, he'd only glance over at me and touch me on the shoulder and that's it- he treats me with respect and we chatted for over 4-5 hrs continuously.

At the very end however, we realised we had vastly different political views, after which he said his family wouldn't approve of him marrying me, but he surprisingly still asked me out again.

However, on the 2nd date, I could tell he wasn't interested. It's like he just wanted to be friends and at the end of it he said that he is now seeing someone else! I was super confused, he's a nice person and not the type to hurt anyone's feelings and I even learnt that he infact arranged the first date in the middle of his final exams! I'm 26f, he's 22m.

How would you react?
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