What Should I Say?

To make this short and to the point, I live a continent away from my family and haven't seen any of them for the last seven years. I'm not the most communicative or accessible person as is, but three years ago I came out to my mother and she took it pretty badly. I love her dearly, and her reaction undid a lot of the work i had done in coming out, and it poisoned the well between us, and it got so bad that i was having weekly recurring dreams about her either hating me or kicking me out of the house. Eventually i couldn't take it anymore, so start of this year i wrote her a letter explaining everything and asking for her acceptance. She didn't reply or speak to me afterwards for the next three months.Yesterday I got a message from her in WhatsApp asking how I am, and I'm torn as to how to reply. I have a strong feeling that if I tell her i am fine we will revert to the silent game we've played the last three years and she'll pretend I'm not gay again. At the same time i miss her, and I don't want our relationship to deteriorate any further than it already has.How should i reply. Should I tell her the truth that I'm not well, and that this issue about my sexuality is one that is here to stay and one that we have to discuss? Or should I just pretend and hope this is her first attempt at making amends?Any advice is much appreciated - thanks!