Paranoia, i can't tell if it's anxiety or actual paranoia?

So I've met a couple of friends randomly in a park, we smoked some weed and talked for a little while. They seem pretty cool w/ hanging out with me, but I've been a little paranoid because the one dude really seems to want me to come over to their place and paranoid thoughts are like "If you go over there, you're gonna get attacked and its a setup." and all of that.

Not to mention that i've had paranoid thoughts in the past about my ex-girlfriend who was LDR. I don't really know what to do and i'm scared that the paranoia may lead to worse things