Its good to know that you are trying to help out your Ex, but realistically speaking - I don't think that you can actually help out like a "friend" would, you may be doing stuff just because you love her.
I think that you need to let her sort out her life, imagine her situation - her going through rough times with her Bf and her Ex trying to resolve the issues. If the breakup between you and her was quite recent, chances are that she is still at times recovering from it, and you being there may not really help that process along.
She knows that you are always there for her, as i gather, so if she needs you she can always call on you, and if she does have feelings for you she can come back to you. I believe that you need to move on with your life, by always being with her, you are not able to recover and do so