Im the same way. I can't tell when someone is joking or or actually being serious. Main thing is, If your friend group keeps doing these things after you ask them to stop, then they probably aren't joking. If they keep making mean and cruel jokes to you after you tell them to stop, then that shows that they don't actually care about your feelings, and they don't care about you in general. That means they aren't your friends at all. and you need someone who understands you. your amazing just remember that and ignore other peoples negative thinking they are just jealous of you <3