No I was like this too. Even when I was somewhat /fit/ and girls hit on me (yes, that happened), I could only act indifferent and angry. Once I pretended I didn't listen to her and grunted after she repeated herself.
I bet she felt embarrassed. I also bet she would never imagine that I also wanted her badly.
When you pass a certain limit, you just go full antisocial. You're needy, but you can't reach out. I hated it. Try reconnecting with family or old friends.