<human>: Could you distill the essence of the text into 1-3 sentences?

Hello! Lurker from couple months on this subreddit. I am 24yo and i just recently split up with a girl. Even though I try to be a tough guy that got into mud/obstacle races and marathons I am seriously really sensitive in relationships with women. 

Being lurker I came across this particular statement at other thread "I don't think it's that weird to stay friendly with someone you at one time committed your life to. If anything it shows a certain level of maturity and non-assholeness on his part. People who have a lot of ex-Es that end in tears and hatred can be a red flag. "

I always cut any bonds after a split up. I delete facebook account of my ex, delete all conversations basically go full no-contact even though I always am in a relationships with girls that I love to talk but I just can't do it after a break up. I really doesn't help me with recovery to see ex's new facebook photos etc. Some of my friends think this is childish and I am immature. There is no tears and hate but I can't maintain contact. It hurts. Am I fucked in the head being this way? Is it really super immature? Do I have to grow up in this area?
<bot>: I always go full no-contact after break-up and my friends think Im childish that I cannot maintain friendship with ex that I previously had romantic relationship.