How to not feel guilty of not liking someone romantically because of their looks?

So I met this guy in social media and he's around 5 years older than me. He's currently pursuing a PhD degree and I'm about to start mine in a couple of months. He sent me a DM request one day and the reason I accepted it may sound quite weird. In my country there's a national level test for research admission where around 5% people qualify and 0.8% of them receive a good national scholarship. I took this exam in January this year, I qualified it but missed the scholarship by the closest possible margin. Although I'll retake the exam, that situation broke my spirit. This guy had got this scholarship last year. So seeing that I decided to talk to him and understand how it feels to live my dream.

Now, we've talked for around a week (not all the time, few minutes in the evening every day) about casual stuff, mostly about how he's doing his work and my studies, the films we like etc. I have started getting a feeling that he is talking to me because he wants to date someone, me in this case. I'm single. However, I don't like how he looks. I don't know how to put it properly, he's definitely fine looking, just not my type. Also talking about books and films I've realised that our interest areas are very different. It's okay for me if I don't want to date him over the latter but the appearance aspect of it is making me feel bad.

How to get over this feeling?

How to not feel guilty of not liking someone romantically because of their looks?
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