I had this problem with a co-worker i liked.
Just try to extend the interaction after work.
"Hey (her name) what kind of trouble are you up to later? (Whatever, usually nothing)
Let's hangout. (Than make up a logical reason. Let's say a party.) There's a huge party later, I want you to come. (Or say, I'd really like to get to know the real (her name) some more, because I really like the connection we have.) she should say maybe, or yeah.
Than when you get outta work text her. If she tries to flake over text later that night do this...
(This is really high risk/reward, DO NOT do this unless you and the girl are really comfortable with each other and stuff. You don't want her to think you're a stalker.)
"Hey, you're seriously rolling with me to this party, so get ready I'm coming over right meow."
(She says no, or gives some excuse over text)
Than literally drive to her place. When you get there text her this.
"I'm literally outside your apartment, I just read your text; let me inside to charge my phone for a few minutes if you're going to be a brat & not want to tag along. It's freezing out here."
She should let you in, start laughing, than say your plans fell through and you'd rather stay and hangout with her if she brings it up. She probably won't.