Knowing isn't doing

I knew better than to loan them money. I had heard her complaining about having to pay back a relative of theirs, when he loaned them some money.
At the time I made a mental note never to make a loan to them. Then she came to me crying and saying that they were going to lose their house. If that happened she told me her husband would divorce her. I asked her how much she needed to save the house. She told me $1000. I said are you sure if I loan you this money that it will be enough to keep you from losing the house. She tearfully said "yes"
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She did this behind her husbands back. I had her meet me at my bank and sign a Promisary note which the banker then notarized. I haven't taken legal action yet, but I think I will have to very soon. (They did lose the house and are still happily married )

That was Feb. 10, 2008. It is now Sept 19, 2010. She has paid back about $110. Every time I approach her she gets just like she did about that relative that loaned them money before me. I feel like I was used. She knows that I am Bi-polar. She played on my sympathies and now not only have I lost the money , but I have lost a friend.

I knew better, I freely confess that. I doubted that the money would fix the problem. Her tears and pleading, along with the desire to help them keep that beautiful house made me do something I now regret with all my heart.

It's not even the money that is what bothers me most at this point. It is the feeling of being taken for granted. I feel like I don't matter to them at all. That is what hurts so much.