Hello,
I have a problem with my relationships.

Generally, I am quite confident, extroverted, easy-going and happy. I have some kind of a strong personality. But when I meet with my friends who have strong personality, too, I tend to be distant, quiet and lukewarm. I have some kind of blockade in my mind and I just can't joke around with them, so they think I'm boring and responsible (but I am the total opposite). I think I might be worried that they would judge me. I hate it because I want all of my friends to know the real crazy me.

Why is it happening? Is it possible that this type of people make me uncomfortable even if I do like them? How to just relax and have fun with them? I have problems with my self-esteem. May it be the cause? How to fix it?

Thank you very much