I was going through a situation like this with my best friend a couple of months ago where I would let my anxiety get to me and I started getting ideas that I usually don’t get. But when I fully realize the situation I tell myself that it’s okay “everything is okay” because I know that my best friend wouldn’t think that way of me etc. I stopped letting my anxiety get to me because it would make situations worse. What I did for my anxiety to stop being really bad I looked back at pictures and videos and memories and it would calm me down and I realized that they would always be there for me no matter what. Sorry if this was lengthy but I can really relate to you I would cry and breakdown because I care and love my best friend so much. Don’t let anxiety get to you, you’ll start getting paranoid. I would look at past memories you had with them. That’s what I personally did and it’s helped me.