I often have 4 or more conversations going on at a time. When you see someone kind of "running around" the CS it might be because they are trying to click on one of the many friends they are jumping between conversations with and if you miss the character you're trying to click, your character starts to run around.

Sometimes I honestly am in such deep conversation and my screen is moving so fast that taking the time to go back, see who messaged me, find your char, then make a response is just way to time consuming and in the meantime my friend who I do runs with, who has helped me out, who I have personal conversations with thinks I went afk or something.

If I'm not busy I'm happy to answer questions, but I don't think you should take it personally and I don't think you should want to quit the game over people not talking to you.