I can somewhat relate meow. The person I'm attracting has done the same with me in the past. I actually talked to her and helped her figure out what to say to end it with the other person(one of many that its been). I felt torn because someone was getting hurt in the mix. And I also felt like you, I don't want to be the fall back or the one who she runs to when somethings wrong. Although, I will say it isnt necessarily a bad thing, because there is still some care and trust there for them to want to talk to you about stuff and take your advice, etc. Though I don't really know what it means. I always seemed to hear from her alot when things werent so good, but when things were great or she was happy with someone then I would be the one doing most of the contact. I don't really have any answers for you. But I can say the "getting tired" part I can relate to. It's going on 2 years that I've been apart from her. But I think it's a good thing to just let it go. I think actually that's the letting go stage. It's the part where you have put your intention out there, you believe in your desire, and you let go.. You get tired you dont care to try anymore, but yet you still believe that it is yours, then it just happens. That is when our desires become ours. I am curious to see what others will say.
Lots o' love