I need help falling asleep next to my wife.

My wife and I have been married for a year. In that year and even before we got married I have never been able to fall asleep next to her except maybe a handful of times that I was fully exhausted. She works days and I work evenings (usually until 11pm). By the time I get home she's been home for at least 5-6 hours. She always waits for me to get home before going to sleep, but she's always either in bed already or half-asleep on the couch.

I get home and need at least an hour to eat and do bathroom stuff. So by the time I could crawl into bed she's been asleep for about an hour or so. For the past decade or so I've been a night owl. Sometimes I would stay up so late I would be going to bed when the people two time zones behind me are getting up to go to work. My body is ingrained with staying up late, and try as I might when I lay down next to her it just ends up being that, me laying down next to her. I just cannot fall asleep for several hours.

After about an hour or so I get up and I go into the other room to watch stuff on TV or on my phone or play games on my computer, and I know that the screens don't help me with falling asleep, but I just cannot lay there indefinitely hoping I fall asleep at some point. I know it affects her because periodically every hour and a half or so she'll come out and ask me to come to bed, and I'll make up some excuse about how I can't or I'm eating, but really it's me trying to put off just laying in bed.

I've talked to my boss about changing my hours at work so I can get home around the same time she does, so maybe our sleep schedules can sync up and I can have a normal sleep schedule, but until the schedule changes go into affect I'm kind of SOL until then. It hurts me because I really do want to fall asleep next to her when she goes to sleep, and even if we're not awake just being next to each other asleep is something that I would love to have for the entire night, but right now it feels like an impossible task to achieve.

Does anyone have any advice on how I can help train my body to fall asleep correctly? Or has anyone been in a similar situation and managed to fix themselves? I've tried limiting my caffeine intake towards the end of the night, I've tried meditating, I've tried deep breathing, but nothing seems to work.

TL;DR: I need help to train my body so I can fall asleep next to my wife instead of staying up late.