Hey E
I know what you're talking about. I've experienced this several times and it really hurts.
I don't think it's important what you say, no matter how boring it is, if you say it loud enough. Otherwise they will just continue their discussion and maybe not even hear you. Make sure that they know who you're talking to. If they're real friends they don't reject you for having a low self esteem or being a lil bit "boring"