Yeh it's better if you go direct this time just too see if you can recover from the last attempt, don't judge yourself sometimes you don't do a great work but you always try to do your best.

Don't start the conversation with an invitation since you didn't talk to her for days, text her a few casual messages (just to doesn't seam threatening) and then try to fit your invitation on the conversation like:

Y: Heey <if you have any silly name for her use it here> how are you?
HB: i'm fine what about you
Y: I'm about to go out in a few hours. How long you don't go out?
HB: bla bla
Y: You know what, you should come tonight!
(Here if she says "yes" cool, if not, well she's not interested mate, move on!)

(If she start to flake then continue with this just for fun)
HB: Thanks but i'm not in the mood today
Y: No don't stay at home, people become fat there don't lose your sexy body! Come and make the other girls jealous!
HB: lol no today i can't
Y: Oh ok then i'm going take a shower, talk to you latter

And see if she start the conversation on the next day, if not ok fuck it!
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Also:
Don't say "or you have to work tommorow?" you are basically saying: i can expect this as an excuse if you want to use it it's ok for me.

Also never ask and answer your question for the girl, sometimes when you ask something to someone you are basically trying to understand how they react (this fits on this example) so you can't give them options.

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Gotta put da cream!