Is it ok to only have 1 real friend in school?

I never noticed how much it hurts to only have 1 friend that you can really trust but at the same time I am really thankful. There is three types of friends there's the ones you only talk to in some of your classes there's the ones that u can talk to and hang out but you don't really tell her/him

any personal stuff happening and there's the ones when you can actually trust and it happens that I only have 1 real friend that I can trust and the rest i guess their not really friends.

Right now I was just laying down looking at the wall listening to some music and right now it was when I noticed that it hurt to only have one real friend and I started crying.