Why are my friends being so petty?

Let me get straight to the point. I tell my squad everything, literally everything. From crushes to embarrassing stories to problems (which I hardly ever have). Now the problem is, 3 out of 8, who are in my form class and probably most closest, act as if I'm not even there. They don't tell me anything and when something happens to me they feel the need to interfere.

Why is this happening?
What is their problem?

Its very hard to tell you the exact problem with such little background, you'll have to figure it out yourself.

They don't sound like good friends, maybe find some new ones or ask them whats good.

The last time I asked they made fun of me. I can't just find new friends. They've been friends with me for 3 years If I were to just be friend them I would be criticised

Let me get straight to the point. I tell my squad everything, literally everything. From crushes to embarrassing stories to problems (which I hardly ever have). Now the problem is, 3 out of 8, who are in my form class and probably most closest, act as if I'm not even there. They don't tell me anything and when something happens to me they feel the need to interfere.

Why is this happening?
What is their problem?

I can't contain everything