So I have a crush on an indian guy, the problem being me being southeast/ east asian.
He was raised in Britain so he isn't that "traditional", I assume, but hangs out with the indian community at our school; his whole friendship group consists of literally all indians and a few white people.
His best friend is an indian girl as well, surprise surprise, and I think she's attracted to him. (Don't think he likes her back tho)
In this situation is it safe to presume that he'll only get romantically involved with those of the same race as him?
Not really. Indian guys aren't particularly in high demand in Britain so I don't think you have to worry at all.