Large age differences in male/female friendship (specific situation)

I’m kind of looking for a sounding board here, I guess.

I’m in a foreign country on a high school exchange. In my town, I don’t have a lot of friends to do stuff after school. Many kids live far away, or just aren’t in to the same kind of stuff as me.

The point is, I can get lonely sometimes and I don’t doubt it clouds my judgement.

A few days ago someone messaged me on Facebook. He was a friend of a friend who had recently come to town and wanted someone to hang out with. I asked our mutual friend about him. She only had positive things to say, but she told me that he was 10 years older than me.

Possibly against my better judgement, I went out to meet with him after school. He seems like a nice, honest person, we share similar interests etc. His behavior was appropriate, nothing remotely sexual/romantic.

We are planning to meet up again, but I feel uneasy because of the age difference. My main worry is that he is interested in being more than friends, which I am not OK with. From his behavior, I don’t have any reason to think that (I’m not getting that vibe) I guess I just wonder why he would be interested in hanging out with someone so much younger. I would like to think it’s because he’s interested in foreigners (His friendship with our mutual friend and her boyfriend make me think that) and/or he wants to keep up his English.

Does this scream “red flag?” or is it not a big deal?