Males, are generally clueless clods, when it comes to picking up subtle feminine flirting. So more than likely they aren't rejecting it, they are simply oblivious.

Females, OTOH, think they have a flashing sign over their head, when it reality they are so subtle no one notices. So a suggestion for women, is be more straightforward. Plus, for most women there is about 0 risk of being more overt and escalating outside of the guy overtly rejecting them. Men have to worry about coming on too strong, or again failing to notice subtle signals of disinterest.

Men are still pretty cloddy, and there's a lot more to learn. But in general it's a lot safer to go online than to try to discern whether you're misreading "signals". "Being on Tinder" is about the clearest signal you can get.

Now just don't mess it up. Hoo, boy, do the men mess it up. I swear I've given serious consideration to opening a consultancy in helping men talk to women online. Not that the women are universally all that great, either, but I cannot tell you how many men I've watched talk themselves out of getting laid.

Her: I had a huge crush on you in high school/college and dropped hints all the time.

Me: But you told me you had a boyfriend/were a lesbian/hated my guts.

Reading the room, flirting, are all part of it.

First move is to recognize the problem