Explained in one interaction.

Scene: An acquaintance at work sees me exiting the cafeteria with my lunch.

Her: smiles and says "hey!"

Me: Half-hearted nod in her direction and keep walking. I have an hour lunch and I'm usually done in 15 minutes. I should have at least said hi back. I didn't even smile.

I'm more than just socially awkward; I'm completely unfriendly and rude.

I don't like the person I've been becoming the past few months and I have the nerve to think that someone else would. Bleh.

Forget dating, I really need to work on just being a friendlier person to the people around me right now.