Hmmm... it seems to me it's probably a bit quick to assume they "cried"out of jealousy since WW101 didn't really say who/why they cried in the first place. Were they close friends? Were they just competition? It's pretty hard to say anything since the reason he made people cry isn't really clear, but I guess that could be asking for too much depending on the situation.
And making people cry (or hurting them in general)... yeah, I know how that feels. My mother used to cry all the time because of things I said, some of them because I had to, others because of my habit of letting my liver do the talking... if you get what I mean. I literally wanted to smack myself in both cases, but you're not always the one who has to re-assess the situation to get over it.
From my (admittedly limited) experience, I can just say that it takes a lot to tell when you're the one who did bad from when the other person did. Sometimes personal flaws get in the way of relationships, and that can go both ways: the chances of the other person not being acceptant of your quirks are just as likely as the chances of you being way too soft on your own flaws and letting them get in the way of the relationship and assuming "Meh, I'm just like that; They should accept me how I am". Problems in relationships often come from either of those two things, from what I've seen. I guess that goes for all sorts of relationships, from close to not-so-close.
That's about all I can say without feeling like I'm assuming way too much (...and honestly, I probably still did).
The rest is left to you.