Why is it so hard for me to make friends?

I'm a kool guy very fun and nice to talk and hang out with but some of my friends(I only have like 4)say the I look like a mean guy cuz I'm very serious but when people get to know me I'm the total opposite of that so if anyone is interested email me or give me you msn addy or yahoo messanger addy I'm 14 btw and my name is orlando