A girl who just recently split up? Should I just back off for a few days?

My Details: My Age 24 Location UK (I know the basics of PUA got myself 3 girlfriends with it in the past 3 years one of them I was with for 1 and a half years, My PUA style is similar to swinggcats)

There is this girl I been chatting to for a while about 2 months we chat like every 2 or 3 days, she was dating someone when I first started talking anyway here is the story.

At first she started the conversation with me on facebook saying if she knows me and from there on me and her started chatting. I started using push pull techniques and started building attraction. She randomly told me she is dating this guy but the relationship with him isn't working, when she told me i just listened for 2 mins and then i changed the subject.

Through time I carried on chatting to her on facebook but not much i respected the fact that she had a man, but i carried on chatting and creating attraction/Comfort, teasing her saying She should come out on a date with me because she seems interesting then i would tease saying I do need someone to clean my room after all so a date would be perfect. She would laugh saying im a joker ect ect. (Push pull example)

We talked for a while until yesterday she told me she is single now randomly and I was like "ok..." then she said she was feeling sad and her bf split because she is unsupportive then she started asking how is she unsupportive ect ect i just told her to chill have a cuppa and get some sleep. (Didn't answer her question)

I said I had to go and she was going "No please don't go" I spoke for another 2 mins just because i felt bad i didn't want to carry on the chat for long as I didn't want to end up in the friend zone so I left with a message saying to her to just chill clear her mind and the next time I go for some coffee she can come keep me company.

When I came on facebook today I noticed she didn't say yes/no to the coffee... or to the message i left guess she was just a bit upset for it, so I started talking today asking if she was feeling better. She said yes and she said i am so unsupportive (because i signed off facebook yesterday when she was asking me to stay) i ignored it, me and her talked for a bit I was teasing her to buy me a car with nitros and a pack of redbull and we had a little laugh. I said i have to go then and left asking her for her number. I checked my hotmail box today and saw her reply and she did indeed leave me her number.

But I do not know whether I should ask her out to a date yet or if i should wait a while?

What should I do? And how should I exactly proceed from here?

p.s I wouldn't also mind one or two nice examples I can use here to create more attraction and comfort.

Oh by the way she is 19. I just think I like this girl a lot first time I ever gave it so much thought.