What do you do when you really like someone, but that someone only keeps you around when they can't find anyone better? When the second someone else is there it's like you become invisible to them. You try to stay away but the minute they call you, you give in and go running. This is the situation I am in, and it is taking a toll on my emotional well-being. Help me, Minerva!
Does this person know how you feel? Have you been intimate? What is the basis of the relationship thus far? Most people are not psychic. If this person is at all like me, maybe they don't pick up on subtle hints that there could be more to the relationship than friendship. As someone who is romantically oblivious, I find it helpful to have some clear communication on feelings. The blunter, the better. If they do know how you feel and still take advantage of you, then you must draw the line and move on completely. As painful as it is, no matter how much you like someone, sometimes it just isn't going to happen. As someone who has always been the kind of good sport is sound like you have been, I wish I hadn't wasted so much of my time on men who didn't deserve it. Love and learn.