Alcoholics/ex alcoholics can you answer this?

So I met my ex 2 years ago. Been broken up for almost year. Took me few months into dating to realize he had a drinking problem and even then it didn’t see that bad until he went downhill after he broke up with me. He never gave me a reason for breaking up sometimes it was that I pissed him off at the end, sometimes it wasn’t he wasn’t sure he loved me etc.
which I get it. We started off our relationship drinking. Difference is, I’m not an alcoholic. But after few months I noticed he was super loving and affectionate when drinking and then when sober he was closed off, irritable, I felt like I was hanging out with a different person.
I wonder if he really had feelings for me and they showed when drinking and when sober he was afraid of intimacy. Or if the drinking made him think he had feelings for me. It may not matter but to me it does. I wish I knew. Anyone who has dealt with alcoholics or alcohol abuse can chime in.
Alcoholics/ex alcoholics can you answer this?
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