Feeling lonely and anxious, People never ask me how I am

Hi everyone. I'm a 17-year-old girl and I feel very lonely. What I'm going to say right now may sounds stupid useless, but it's not for me. So I will ask you to pay attention and to try to understand why I feel this way
So ok I'm 17 and I'm in high school. I am not very shy and I could even say that I'm outgoing, I talk to people very easily it's not really a problem for me. Most of people like me I guess and find me funny because I'm a bit crazy and eccentric.(I'm quite proud of that) yet I have many issues that I can't get out of my head.
First of all, I don't know if you have noticed, but most of teenagers nowadays are into drugs or love to go to parties to get drunk and all (I'm not saying everyone is like that, I'm just saying most of them) and I am really not into those things. I'm really not the kind of girl who will start to do like everybody just to have friends. But still I'm very anxious about this. I feel isolated from other people and alone.
But also here is the second thing I'm dealing with and it's very hard to struggle. Despite the fact that I feel isolated (I started to get used to it so I try to not bother anymore) I feel unloved, unnoticed. Like I have some friends but very few close friends and even those close friends I'm not sure if they really care about me. You're gonna say that i'm selfish, which I am , a flaw that I'm stuck with, but I can't help it. I somehow need people to give me interest, I'm even addicted to people! I feel so shameful saying this and stupid, because I am like a slave. I wish sometimes I could have no feeling and no affection for people. Because it really messes up with my head. For example if I don't text a friend, she will never text me. It's a stupid example maybe but I never feel that people care about me. I'm just always making the first move, almost licking their butts because I want some recognition. I'm pretty sure that if I disappear they won't even notice. All I'm asking for is a little bit of recognition. I feel like nobody cares about me, they're always doing their business. Once again I might sound selfish, but I'm doing so much efforts to care about people, even the most reclusive ones I found a way to get
Close to them. I make them talk to me, express their feelings and all, but I don't have it back. People never ask me how I am going or how they are going, I always have to be the one who goes to them asking them how they are.
Please help me to struggle with this, I know it might be preposterous, to make
A great deal of anything, but I'm seriously in pain.