Or you could, y'know, just not bother interacting with him, in preference to e-stalking him.
I've been having a non-social period of about a year now. I'm actually extremely happy about it TBH. I have a girlfriend who is fantastic, I enjoy my subject at university and am hugely improving my most cherished of skills, critical analysis. Why should I participate in what has for me, to date, been an aggravating, never ending, real life recreation of every $2 soap opera ever? Up untill the start of this year I invested huge amounts of effort into talking with friends, doing things they wanted to do and listening to their interpretations of the world. Then I met my girlfriend and was exposed to what it's like to not have to fight to get my point of view understood by people who think the moonlanding was faked, who think generalisations like homosexuality in males=femininity are accurate or people who have shit lives but just blame their problems on external factors and never get off their asses to change anything about either themselves or their situations.
I stopped bothering listening to my then friends, stopped bothering being nice and trying to maintain others' positive perceptions of me and became an anti-social recluse. Frankly, considering that I no longer have to play along with gossipy webs of intrigue, talk to people I find small-minded and ignorant, pretend to enjoy others shitty senses of humour, be supportive of people who are creating their own problems and no longer have to be generally pleasant and patient, I find I'm enjoying my life much more. I can focus so much more on fixing my own problems in life; I used to have fairly major depressive episodes once or twice a month because I wasn't really doing anything to challenge myself, just puttering along. Now I have maybe one minor depression a month and that's just because I've hit a challenge at school that I didn't just breeze through. Being happier and doing things *I* enjoy feels much easier when I'm not taking on other's burdens and am not considering what they think of me for my actions. I'll be as feminine, disdainful and aloof as I like, fuck their ill-considered values.
Of course, you might've noticed that little bit about the girlfriend and correctly concluded I'm not totally isolated. That would probably be even less mentally healthy than the whole 'taking on everyone's problems' thing. I look at it as a balancing thing: I still take on other's worries sometimes (or in the case of my girlfriend, often), but the fact that I don't give a shit about 95% of the people I interact with doesn't worry me. I'm not a dick to them, I'm still willing to offer help if it seems like someone needs it (I'm studying psychology after all), but I'm not here to please others, and I don't care if they think I'm a snobby know-it-all of ambiguous sexuality, because in the very end, fuck it. I'm much smarter than most of them and talking to them makes me bored and a little sad. If they were worth talking to to begin with, I wouldn't have stopped doing it.