Some people (your neighbor for instanace) just are not good at editing their thoughts. I am sorry her comments were hurtful.
Having a nice front lawn pays off. The care that the lawn requires me to be outside and I find myself to available to meet and greet and lot of neighbors. Conversations are usually short and sweet but nice. This doesn't take the place of a good friend, but human contact and connecting with others helps with the isolation.
If you find you are unable to do a lot of physical work, hand watering keeps you out in the yard and is acutally quite relaxing. Anyone else have any suggestions?