I think I've outgrown my friends and I don't know what to do?

In my 5 years in college I had 3 different set of friends. 1) Two-faced girls, 2) Geeky, introvert girls who love concerts, 3) Geeky, introvert and depressed bisexual/gay friends. The one I have now is the third set, and this is the group where I really felt like I belonged because we have the same mental issues, we can make fun about ourselves and relate to each other. I have been depressed and socially anxious for 5 years and they have been the longest friends (2 years) I had in college.

We’re all in our early 20s. Since we all became friends, the only things we do are walk, go to our other friend’s house, order pizza, play video games, complain about our problems, laugh at memes, order McDonald’s and play video games again. We never went outdoors. We made plans but they never happened. Then, we go home and just do these things all over again and complain how bored we are. Oh, and all of them live in the same area. I don’t, I have to travel at least an hour and a half to see them, and another hour and a half for me to go home. This happened for 2 years until recently when I felt extremely drained.

Recently, I feel like I don’t belong with them anymore. I felt like an outcast or something. They don’t want to try anything new, but I want to try things. I’ve been smoking pot, I tried psychedelics and my world changed. I saw a different side of me, I knew new things about myself and the world. I see my friends, I tell them stories about my experiences and I tell them I want them to experience the same things. They show interest but I know they don’t really want to. It’s not because they’re scared, it’s because they prefer to stay in that room isolated from the world, complain about their life and just play video games. I know them. They are my friends. All they ever experienced are the pot brownies they ate in another friend’s birthday.

For the past two weeks I’ve been doing some personal growth stuff and I feel like I’ve outgrown them. I grew tired doing all those things. They’ve been inviting me to hang out and all I can do is pretend I’m busy or I don’t have wifi or I’m not receiving any of their texts. I know that’s a very rude thing to do, but I feel extremely anxious for saying no. I don’t want to turn them down because they’re always there for me, but I just ghosted out for a week now and I don’t know what to do.

I don’t want to be stuck. I don’t want to let this depression ruin my life, even if it has ruined my life already. I don’t want it to continue anymore. I don’t want to surround myself with negative people, full of negative energy and lethargy. I’ve been toxic and still surrounding myself with toxicity and that’s not gonna make me better. I want us to recover from our depression, but we’re definitely not doing anything to help ourselves. We just complain, make plans and do nothing and I don’t want to be like that anymore.

I haven’t talked to them in a week. My closest friend in the group feel really bad because I don’t talk to him anymore, and I don’t know if I should say sorry or explain myself. Should I tell them I’ve outgrown them? I want to tell them that I don’t feel like I belong with them anymore but we can still be friends if they want, but I don’t know how to. Everything has been overwhelming for me and it’s paralysing. I feel sad for losing them, I’ve been thinking about them for a week already. We had so much fun, but I don’t want to be like that for the rest of my life.

How do I approach them? What should I say? They’ve been messaging me on Facebook but I don’t know what to say to them for ghosting out in a week.