I'm sorry things are so hard Sam

It's terrible to feel rejected by a friend like that
Are you sure it's just you he's blowing off? Some people have a habit of doing that to just about everyone. Either way, you could think about changing your approach by contacting him in a different way or asking him to meet up to do something different that may appeal to him more.

Is it completely out of the realm of possibility that one or more of your other in-school friends could learn to "get" you if given the opportunity? You are upset that you aren't being given a chance, but are you giving other people a chance?

Reaching out is hard in social situations at any age, but harder in high school. And things are obviously more complicated for you

Feel free to vent anytime.
And feel free to let us know that it IS just a vent…
I did get that, but I couldn't resist suggesting you try to work with that you already have friend-wise. I'm sorry

I'm going to continue to wish for the best for you Sam
Kay