I don't mean to be a jerk about it or anything but... he just... keeps making me feel increasingly uncomfortable about it

Awww.

I already made it clear to him that I'm in a happy relationship, and that I'm not interested.

Discussion begged me to tell you that he still loves you and is single again.

His exact words were "fair love, it is, discussion, son of the virgin, spiritual successor of vladimir lenin, the consummate revolutionary of south texas. i have not forgotten our pact, forged in the infancy of the universe, pre-ordained before our own meeting...i still care deeply for you, and why not? although we are separated by age and invisible borders, i carry your fire in my breast. my writing must be brief as i have business to attend to. stay gold."

Hope that helps.