No, there's a reason either you broke up with him or he broke up with you and trying to be like friends with someone you broke up with is very awkward so there's no point.
You should just tell them you like them unless they are in a relationship already or just broke up with someone.
Sure there is no harm in it.
If you like her, you should tell her, but be aware that not everything people say is true.
They were to busy with work and they broke up like last year and then they tried it again but they broke up again now because they like never see eachother.
You should talk to her and if she agrees to go out with you again then try not to mess things up again. If you make the mistake of breaking up with her again, if she agrees, then you don't deserve her.
Probably not - there must be someone else you like too?
You need to find inspiration. Like if you like someone, you broke up with someone, your upset, etc.
try to find someone else make them jealous if you broke up with them and you still like them then they might like them and u can slowly build up a relationship again and work out your differences if they broke up with u then make them jealous and regret leaving you
It means you liked them the whole time (subconciously) and u should go out with him or her.
be yourself, if they liked you befor they'll like you again.
just ask her again after a while or try someone else you like better