If you feel that you've settled into being some one else's back up plan, believe it. You deserve so much more than feeling appreciated occasionally. It could very well be your insecurities speaking up and maybe some kind of unhealed drama king up. Maybe they've been holding back because they misinterpreted your intentions. That happens a lot. We're complicated people. So take time to observe and communicate and really think about it. But once you have, if you still don't like what you see or hear, then you probably are. And it's time to take your talents elsewhere. The sting you feel from cutting that person off is so much better than continuing to invest yourself