There was espicailly one woman of whom I became fond of.
Teachnically, it should not end in a preposition:
especially one woman of whom I became fond.
and it still needs another adjustment:
There was one woman of whom I became especially fond.
I think also should go after continued, but it will be even better this way:
Another reason I continued was that I knew my time would be making a difference for...
#3 is fine, no need for a change. You can support and communicate with anyone you like.