Friends and relatives always like to make fun of me

Actually, you can be a little more relaxed and not too formal. I think these examples you mentioned are common, unintentional and harmless. You don't need to figure out the meaning of every word of others. Most of the time, she just said it casually. Someone makes fun of you, you make fun of her, someone pats you, you make faces or something. In short, you can be sunny and positive. In this way, you will be happier and others will like you more. You are all related. I think they all regard you as their family. You really don't need to worry too much.