Ok so I have this friend that I talk to and I would say that we're pretty good friends. We get along pretty well and have been together for a good few years but for some reason when we're around other people they don't seem really interested in me when I try to talk to them and I usually carry the conversation until I give up. I even went out for my birthday with them yesterday and we had a pretty good time but today they seemed a bit off. I don't see this happen when they interact with my other friends as well. I'm just so confused and a bit annoyed .