Thanks for bringing your question to JustAnswer.
You may want to read up on Co-dependency...the trait of putting other people's needs before our own. For some people, co-dependent traits start in childhood. If they grow up in a chaotic home,--( due to alcoholism, divorce,domestic violence, problems due to poverty or mental health)-- the child learns how to survive by pleasing others, and working hard to organize things, and to help keep the peace. This is a positive response in childhood, and necessary for survival.
The problem arises later in life, if the person still feels like it is his job to fix things for others, especially those who seem helpless or like victims. There is a subconscious pull of familiarity to helpless people...your wounded birds. They make you feel needed. Strong, healthy people don't give you the same feeling.
If this rings any chords with you, one of the best writers around on co-dependency is Melody Beattie. If you did grow up with alcoholism, in addition to therapy, you may want to try Al-anon. Even if there is no alcoholism in your life now, you will find a lot of help in breaking the habit of always needing to help, rather than being attracted to partners who can fend for themselves and be an equal to you.
If there was no substance abuse in your family, you could try Co-dependents Anonymous (CODA) instead.
There are therapists who specialize in this issue, and it may be well worth your time to seek one out!
Hope this was helpful. Please click on ACCEPT if it was, or if you need more, just reply. Best, Suzanne