Hi Liz,
Bows the time to start calling in some favours as I guarantee your friends have backed off as they are worried about crowding you and don't know what else to do. Ask someone to come over or take you out. Ask someone to come with you to chemo, book some people in to stay with you on the days you will be off after chemo if that's what you need. People will jump at the chance to help.
As far as being emotional about the chemo, well I'm sorry to say but that's not surprising. You come so far but then think you still have so far to go. Your brain is screaming at you to not do it but you know you have to. The same thing happened to me in the middle of my chemo treatment. I put a post up and was amazed by the amount of people who said the same nigh happened to them. Hang in there as you will get through it. As Deanne said, plan something for you to look forward to. I think to, that it is ok to acknowledge that you feel like this and that that is ok too! It's all part of it unfortunately. Take care. Karen xox