Why don’t guys tell girls that they like them?

I can't answer from a guys perspective but I think it runs along the same lines as why anybody doesn't like telling someone they like them.
It's the fear and vulnerability that goes along with admitting feelings to someone, and the fear of rejection or negative backlash. Ideally, we'd all love to be certain that another person likes us back but that's never the case and that's where the missed opportunities are.
I guess it's just people trying to navigate the murky waters of liking one another whilst avoiding some time of hurt

It is the fear of rejection that is not letting him speak his thoughts and emotions, if you already know he has legit feelings for you and you do too then why are you waiting for him to tell you? You see that is also one stereotype that people are always talking about "oh guys are always the one who asks the girl out that is why they should also open the door of their emotions to the girl...blahblah" be a change and hit him up, he will realize that you are willing to go to that extent and he will most definitely be more comfortable with you. xoxo

dont categorize! not all men and guys are the same. just wait c:

guys are unusual creatures... I believe they're way too shy

Fear of rejection, it just sucks when the girl you admire and want to be with just doesen't like you back, and that fear keeps us guys from approaching women.And most of the times, women are already dating someone,so it's a presumption that it's basically no use. I liked a girl, and we did exchange glances and she caught me looking at her one day.I sort of pretended that I wasn't looking.I admit I am shy.But then, I saw her glued to her phone and not taking so much of interest anymore, so I presumed that she was already with someone and didn't take it further.Although I did speak to her at one point of time.

Fear of rejection. Fear of consequences: lots of girls will completely ditch a guy because it's "awkward", even if they were friends beforehand.Why should there be missed opportunities? If you like them, surely you could tell them instead of waiting for them to tell you.

The real question is why women so often feel they ought to be catered to in this fashion. Why don't we challenge this unnecessary convention instead of ponder over the mechanics of it?

It's probably because of a lot of things. Shyness, fear of rejection, or just a lack of self confidence. I know because I suffer from all that myself unfortunately.