Any advice?

So, my relationship is complicated.

However, recently she has seemed uninterested in me and doesn’t talk much to me. I’m very scared of annoying her or bugging her too much (its a long story) so I don’t start conversation a lot. Therefore, I haven’t spoken more than two sentences to her in a week. Why does she act like I don’t exist? I feel like I’m just another thing she has to put up with. I feel like I’m just a burden on her. Should I just count my loses? Am I just overthinking al of this?