No, its harder in their 30s -_-
Lol, yeah I'm not as much of a jerk as I used to be despite what people see on this site from me
I don't think so, its all about confedance
Yes, it is very yes to make guy "friends"
do you know why they are uncomfortable with you? It might be a situation you can change if you are good at subtle manipulation.
I don't think you can blame it on being a woman or in a certain age group. While I don't know you or your personality, the responsibility of being friendly or making friends is solely on you. Every person is different. Some make friends easily, while others take time to open up to others. It isn't about being a specific age or gender, but it is about your own personality or inhibition. I suggest taking a look at your approach to others, and determining whether or not you might be the reason why this is hard.
I am in the same boat. Girls are trickier and I try my best, but can't stand pettiness