Hi Glow Worm and welcome to SR....
I know how you feel....When my exA was sober he was very distant and isolated. I met him when he was a the peak of his drinking, I never knew him sober. I used to think the same things, "maybe he doesn't love me anymore, maybe he doesn't like me."
When he was drinking he would tell anyone that would listen, how much he loved me, I rarely heard that after he stopped drinking. As a result of my insecurites, I badgered him, hounded him, wasn't very pleasant to him, because I was afraid he would leave me. I believed I sent him back to the drinking with all of my craziness. I wasn't consistant with supporting him when he needed it most. I was a mess back then.
Today, I have learned to let go and work my own program which requires a lot of "me" time just like an A's does. Give it time and spend some time here and at Alanon, attend an open AA meeting, you will find you are not alone and quite possibly a better way to handle it than I did.