Glad you're here. Like you, I also never drank in bars. I only drank alone at home.
My big problem was stopping after I started. If I had one drink, I couldn't stop. I would drink until I passed out. I also drank, even when I didn't want to. That was another sign of a problem for me.
And like getr345 said, if you can't quit altogether, that's another sign of a problem.
But we can't tell you whether you're an alcoholic -- that's something that you need to feel out and explore for yourself.
If you don't want to drink all that wine, you don't have to do that anymore.
But I'm glad you're here and I hope that you feel better soon.