Don’t be sad or do not let ANYONE make you feel like you are in the wrong path or the voyage of a loner creep, etc. Just because you are not living like a photocopy machine and repeating the acts of the other sheep, it doesn’t mean that your life deserves negative criticism.
I am forty years old, single by choice, and i have always loved school, reading, academy and philosophy. I consider myself lucky because I choose to spend my weekends with my books and solitude and also I chose to spend few years in my 30s focusing on my master’s degree, while my “friends” were wasting money on debauchery.
I read your entire thread and you arent doing anything wrong.
One day, you will find a wonderful and a cute girlfriend who will be as nerdy as you are.
Honestly, having deep friendships is not easy. It is nothing personal. It is all about what is convenient for people. For instance, most of my friends are married and those who aren’t married want to spend their time going to a spa, then wine tasting and an expensive dinner. I, on the other hand, would like to have a small, intimate dinner at home and discuss philosophy or politics. Or spend my weekend camping and hiking, while enjoying the evenings with some heart opening conversations, poetry reading, etc., by the camp fire.
Therefore, I dont have many friends.

I would like to share a personal experience.
Few years ago, while doing volunteer work in Cuba, I met a guy in his late 20s who spent the entire night (sunset until 05:00) watching a hole in a tree so that he could take a picture of this very rare insect (which was living in that hole) that is only found in Cuba. He was from Iceland on a research trip. While he was spending the evening focused on an insect inside the hole of a tree and discussing anthropology and history with me, everyone else was getting drunk on rum and dancing. There is nothing wrong with either choice.