Trying to find a Harlequin romance novel about a heroineis devoted to helping orphans, uses her salary as a model to take care of them.a man with a daughter falls in love with her, although they eventually makelove, she won't commit to him and walks away.

Harlequin's website has a search function. Give that a try. Vary your keywords.

https://www.harlequin.com/shop/index.html

If you can't find the right romance novel, call the reference desk at a larger library in your area. They will have a "find a book title" database that they will search on.

If you still can't get an answer, post here again and I will check at Chicago-area libraries.