Dealing with Social Anxiety in College: Feeling Alone and Misunderstood

I suffer with really bad social anxiety and I’m just now starting college. It’s also the first time I’m going to a public school. I’ve only had two classes so far and both times my anxiety was so bad it was debilitating. Yesterday was worse and when I was telling my boyfriend he said “is this going to happen every time?” And I got very upset that this was how he reacted and I was still having the anxiety attack while I was telling him. So I snapped at him and he got mad at me for snapping. I know he truly doesn’t understand how bad my social anxiety is. He was saying “well I would just do this” and I have to explain why I can’t “just do this or that” because of my anxiety disorder. Idk what to do about this. I feel so alone already, his reaction makes me feel even more alone..