Early 20’s IS young, myself and I would bet several of those posting have DECADES on you and very likely life experience of situations like this, either being in them themselves or witnessing others who’ve gone through them, I certainly have.
It very very rarely turns out well and often turns out VERY messy and I’m afraid you will likely come off worse than he would. It’s still very much a man’s world I’m afraid
At the very least wait until you’ve left that company a few months - which you will think is ages it is NOT!
Why?
1 it would protect him from any potential allegations or rumours of sackable offences - @nokidshere 40 years ago is a LONG time the regulations and dynamics of workplace relationships has changed massively!
2 it would protect your professional reputation too
3 it would give you both some space to see if you really are attracted to each other when you’re not seeing each other every day. Familiarity can breed contempt, but it can also create a false sense of affinity
4 if you have some space and give him a chance to move towards you then you’ll know if his interest in you is genuine or if you were just conveniently available - men can be lazy sods when it comes to meeting people!