Trouble sleeping is a common issue with alcohol consumption. They say that most fall to sleep easily but the REM and good for you sleep is disturbed and you are very restless. Sounds like you are absolutely prone to this and hence, will have to decide if drinking alcohol is worth it.
First, lost sleep is lost for good. You can't get it back. But sleep is a variable thing, different people have different needs and different strength of body. What might be happening is, you might like the feeling of being a little high so much you really don't want to go to sleep, you want to enjoy it. I used to be that way when I was a young man and still smoked pot. Others would be put to sleep but I liked it and didn't want to go to sleep because I was having such a good time. But when I started getting anxious using it, I stopped and haven't seen the stuff for nearly 40 years now. When something is no longer fun and you keep doing it, you have to wonder why, but if you're still young, there's no great loss in losing some sleep. Life isn't all austerity, you gotta enjoy it. But if you're not enjoying it, don't do it or if you are enjoying it do it less often so you can handle it.
I know what you mean I've been experiencing this since the beginning of this year. I go out and drink if we're chilling outside I get extremely cold and don't feel like doing anything anymore all I wanna do is get to my bed and sleep. But when I rest my head a whole lot of thoughts start racing in my mind. Give it be unwanted existential thoughts or thoughts of what I could've done differently during that night.