How can i stop thinking i suck and that people dont like me ?

keep saying what you are saying i am smart and people like me

It will take practice to change your thinking. It isn't uncommon for people to feel self-conscious and self-critical, especially at 17. To climb your way out of it will take time and diligence, but you can do it. Find the holes in your old way of thinking... for instance, if you catch yourself thinking they don't like you, ask yourself if you really know that or if you could be wrong. If they didn't say they didn't like you, you might well be wrong. If they just move away from you, it may only be because they think you want to be alone. When you're in situations where you feel awkward around others, distract yourself by thinking of them or asking them questions. If you think too much about yourself, you'll probably start picking at yourself. No one is liked by everyone, and that's okay. Not even famous, beautiful, rich people are liked by everyone. If you are kind to others, it's guaranteed you'll be liked and treasured by some, and that's all any of us need. Recognise that your feelings that people don't like you are just that... feelings. You aren't feeling certain of yourself and perhaps aren't liking yourself because you're being critical... but that doesn't have to do with what they feel. It doesn't mean you aren't likeable or liked. Look for evidence that you are wrong, that people actually do like you. People talk to you, sit near you, ask you things, and so on. All of these are signs you are liked. I've sometimes found it helps just to feel love for myself... like imagining myself holding myself and feeling love and warmth. I try to think of good things about myself. Walking in nature and being around animals also helps to heal the spirit. Give it a try. You already recognize that it's just your thoughts making you feel you're undeserving... that's a good start. Now you can build on that with practice. If you could think your way into feeling unliked, you can think your way into feeling liked and seeing that it is true. I know you are liked.