Stef,
I changed career path and my complete social circle aged 25. Caused some serious rifts with friends, put me back financially and set me off on a career I had no paper qualifications for. At the time the obvious advice was that this was a dumb move and I'd have less spending money and lose some good friends I'd had since school and college.
I don't regret a day of it.
But have the chat on Monday and then go away and have a few sleeps on it. If you still feel the same having said it out loud to the head and you still feel the same next weekend then go and do what you want to do. You know what, if in 6 months time it turns out it was a mistake, that's no big deal. Swap again.
No point in spending the next 40 years in a job you don't like or the next 50 years wondering 'what if'.