I've actually find online friendships easier. I can open up and be myself, and if they don't like me, they usually stop respond; if they try to be mean to me, I just block their emails/messages. The only problem I had is when I get attached to someone, and then they disappear and stop responding out of the blue. I was friends with a girl online for about 2 years, and I got quite attached to her, but then she stopped responding. Then I also had a very close guy friend online, who also stopped responding--just after he opened up and told me a lot of personal stuff about himself! I still can't figure out why they just disappeared. Of course I miss them, but then I am still glad they were my friends for a while.
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"To be stupid, selfish, and have a good health are the three requirements for happiness, though if stupidity is lacking, all is lost."
-Gustave Flaubert