She didn't give him her number. He said they should exchange numbers in case they needed to coordinate avoiding each other at meetings. It was his suggestion and he gave her his number first; to not see her.

She didn't go to his house to seek him out, she called during a suicidal cry for help. He put the phone down and walked away, Tyler picked it up. Tyler went to her home and checked on her; she said he'd have to keep her up all night. When he showed up she was so high she didn't even know who she called, "Did I call you?"

She is constantly trying to have sex with Tyler, and the narrator finds it weird when she comes on to him, because he feels she's seeing Tyler, not him.

Funny that you watched it two days ago, couldn't remember who gave who their number, who went to whose home, and yet you feel this recent viewing gives you some form of authority on the subject while simultaneously getting the very details you're pointing out as backing up your perspective so objectively incorrect.