DH had a friend that he met through dropping 6 month old DD off at nursery a few times a week. He knew this person first and then I met them and we became friends too.
This friend started asking for a lot of favours from me, many of which I had to juggle around work, etc for but I didn't mind at the time as I like to be helpful and she needed the help.
After a while, she got back on her feet and didn't need my help anymore. What's sad though is that I realise that for her it was a friendship of convenience. She used me, she used us, and now barely makes the effort to speak to me. 
I haven't outright said that DH shouldn't be friends with her anymore because of this but in reality, if I found out he was continuing the friendship I would be really hurt. AIBU?