Turns out, being rejected by someone you're in love with actually sucks, and that goes double if you were friends with them. Sure you can try and stay friends with them after, but whether that works depends a lot on your state of mind/mental health, the rest of your social circle and the state of your life in general (and on how the rejecter/friend acts, of course). Your average 4chan poster is spectacularly ill-equipped to make it actually work well, even if they somehow aren't somewhat misogynistic.
At the same time, just keeping it to yourself is probably not a good option either, if you're not the type who can actually move on after a while (e.g. by crushing on someone else).