He's not really any of the above, way deeper than a crush, love?, no relationship, too love for friends, but friends, and why not add a dead status?
It just seems like, it was a humbug. Remember what Barnum said about suckers? Yet I don't think so. If we ever meet again, don't ever call me sweetheart again Mulder, even though I know you mean it. Not into cowards.
True.
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"Ever since I was a child, I’ve never allowed myself to get too close to people. I’ve avoided emotional attachment. Perhaps I’ve been so afraid of death and dying that any connection just seemed like a bad thing, something that wouldn’t last." Dana Scully - Christmas Carol.