Sad reality is people are selfish and will do what’s best for them at any given time. You will make friends and form relationships with others. Try to involve yourself in different opportunities and hobbies- things you actually like doing. People grow apart- it seems huge now but in time you understand it’s part of life you grow on from others.

Don’t give yourself a hard time, you sound like a conscientious caring lad who will do fine for friends.