Getting the number is part of the process:
(1) Get her number.
(2) Try to make a date.
(3) Does she show up.
(4) Date goes well... you figure out she likes you.
(5) Return to (2)
If this keeps happening you have something to work with.
Not going to tell you what to do... but understand that the woman you are dealing with right now is either taken or she isn't attracted to you. I never delete numbers, I just never invest and emotional energy in her... ever, unless by some chance (which BTW is VERY low, but it does happen... again do not expect this). But if a woman doesn't respond there is a very very good chance that you really don't have a shot... what you do with that information is up to you. You got to step (2), then nothing. Congratulations, now you know where you stand and you didn't have to spend one dollar to find out if she is right for you. It's always a win-win when something goes sideways in this process... you either move on to something you want, or you discover early on sh1t isn't likely going anywhere.