Why do I feel so out of place with my friend group and can’t seem to reenter old friendships?

Recently I’ve noticed that I have a lot of people in my life that I’d like to have stronger relationships with. And idk where to start

For one the friends I have now are mostly girls, which is fine, but I’m not gay and it’s very difficult for me to be comfortable sometimes and I wish I had more guy friends. I had a couple a few years ago but I was petty and cut them off. Now I want to reconnect and try and become better friends again but they have new friends and a hangout a lot more and I think I’d be awkward to just ask to join or to be added to a group chat bc the whole dynamic has changed.

There’s a couple guys I’ve tried to connect with but it usually goes down with me trying to reach out or make plans, and then nothing really happens, then we start talking even less and it fizzles out.

I feel like a lot of people in my life have so many connections to other people and each other, meanwhile I’m sorta out of the loop. Everyone has a significant other or at least an interest in someone and all the couples are mostly all friends, which just makes it even more difficult for me to try and insert myself. I feel like I’ve been blocked out of my friends’ lives.