Why do I have an emotional attachment to a girl but only when I’m drunk?

I care for this girl regardless, she’s lovely and has proved to me that she cares for me deeply also. It’s been a good 6 months since we cut contact with each other but every single time I get drunk I think of her and how much I’d like to be with her in that moment, but when I’m sober I do not feel the same emotion. When drunk I promise myself that I will try and make amends with the girl and pursue her but I wake up the next day and blame it on the drink. Does anyone have any similar experience plus some advice because I’m honestly at the end of my tether with this conflict.