How do I stop being a push over, and stop caring what others think?

Often times I find myself caring what other people think about me, and I really would let people talk to me any type of way. Lately people have been rude to me a lot and I don’t think it’s because I’m being annoying cause half the time I don’t even talk or half the time when I say something it’s not anything bad.

Even when I do say something back, it’s not as good as what other people say so I end up getting laughed at more and it really frustrates me. I’ll say one simple thing and somebody will get annoyed at me and it’s not anything silly. It’s usually a general question or just having a conversation.

How do I stop feeling so out of place, weird and stand up for myself more?