One of the best things Michele has written about is GAL. Sounds like this would be good for you. If you like working out, join a gym or start running 2 or 3 nights a week. If she can have hobbies and friends, so can you. Stop looming and looking for scraps of attention and, Get A Life! Don't talk to her about it or tell her your strategy, just do it.
If you would benefit from counseling sign yourself up. You do not need her permission to seek help. The people here can probably find a good one for you.
