From my experince, honestly just approach him and ask start a conversation and bring up something like school functions, or parties, and just ask him is he dating, because he might not be responding since he’s in a relationship. But once you be assertive about why he avoiding you , you will no for sure. And you do deserve ana answer and have the right to approach him since he’s putting you in a grey area.STay Confident, and find out if he want to persue you or not, and from there you can move on.
Or if you want you can alwaya ignore him and stop giving him your attention, because once you stop giving people your attention that is when they come after you. B
Best of luck Stay Confident, and do not worry about the other girls, looks aren’t everything!