I get this happening pretty often. Will tell about recent experience:

Met a girl in the club, she was with her friend. Both were into me. I was into this one. At the end of the night, we made out, ass grabbin and all. I told her to come over to my place. She said she can't leave her friend alone, since they are traveling together and herself too, said lets hangout tomorrow. Gave me her Instagram.

We made out more, they left.

Next day i text her, an emoji, she replis back with a silly one, on which i replied "is it the weather or you miss me?"

She has seen the message and not replied yet.

This kind of things happen to me often .

What should i improve?

P.S. actually her friend was also into me, so maybe she doesn't wanna leave her cuz of fuckin wit me?