oh god I really feel for you I have been in exactly the same situation and its not nice :-(
I rent a field for my pony and the field owner has the house directly infront of the field so I have to walk through his garden basically to get to my field - his wife died and hes in his early 80's and I had not long left my ex..
started off innocent where he would wait outside for me to have a chat about life basically and I felt so sorry for him as he was all alone...
then it started turning into almost stalking.. he would follow me to the field - if I was on the phone he would stand there and look very annoyed at the fact that I hadn't finished my telephone conversation to speak to him!
He then started finding any excuse to touch me, brushing something off my arm, pushing my hair back from my face etc then one day he called me over and asked if I would like to move in with him as he had a spare room and he knew I didn't like living back home with my parents which obviously I declined.
I gave him by number a long while ago for emergencies - he was obviously in a better situation than me to see if anything was wrong with the pony but then he started ringing me constantly, 3,4,5 times a day for no reason other than wondering what I was up to and what time I would be at the yard! couldn't block his number because twice he did call for genuine reasons.
A week later he then called me over and asked if he could be my "gentleman friend" and have all the benefits that goes with that and I could have everything signed over in my name! (house, land etc) needless to say I told him where to go!
Made my life hell with the constant insinuations and so I would turn up to the field in the pitch black, headlights off and creep around! couldn't move the pony (for reasons that I wont bore you with) so had to make the best of a bad situation and basically avoid avoid avoid as much as I could....
situation has improved somewhat now but im still very wary and try to avoid him wherever I can..still calls me now and again to tell me a certain program is on tv or a tree has fallen down in the field but I let it go to answerphone now...
sorry didn't mean to hijack your post but my point was I know how horrible this must be for you - I did the same thing after I was propositioned, cried for about a week!