My husband doesn't feel the same about me and needs some time to think

My husband of ten years told me that he hasn't been happy in our marriage for about a year or so, and wants some time and space to decide what he wants to do, whether he feels enough for me to continue with our marriage.
He has been living at a work friend's home for 2 weeks now while I am still in the marital home, which was his home before we met 12 years ago. We met through online dating and I moved to his home when we married ten years ago, leaving 4 adult children ,and grandchildren, and friends to be with him.
I think I am coping quite well at the moment as we are trying to keep communicating and he is still popping in to the house to collect the odd thing and to pick up any post. During the day I am fine as I am kept busy at work, but nights can be horrible as I have to sleep on my own in our huge king size bed. I find myself crying myself to sleep a lot.
What I am finding really hard to deal with is that he is still so affectionate and is happy to give me a hug and a kiss goodbye when we have met. Surely he must still feel something for me if he will behave like this? I know that I have to give him some space and time to think things through, and we have agreed to re-evaluate our situation after 3 months. But what is the hardest thing to deal with is that in the end I will probably have no say in the fate of our relationship and it will be his decision whether we have a future together or not.
I am trying to keep positive and look on the bright side as I know how much he has loved me, and I am sure deep down he still does, even if he is not sure about it himself.
This is my second marriage. My first husband left me for one of my friends after 17 years, and had been unfaithful for years without my knowing, with several other women.
I am desperate not to have another marriage fail and to be left on my own again.