Why can't he let me know

That night when the girl in black dress was standing the road side and waiting for her boy to come in the heavy rain, she was really happy as she got time to spend with him, she wanted to talk as much as she can that night and love him with all with all that she had  but her happiness didn't last for long. she got a lil it low when she realized he can't even come across the road to hold her hand because it was raining while she can get wet waiting for him, she ignored it because it was just the beginning of the night why to spoil it!
She herself went to him and stayed.. He took her out for dinner but he wasn't seeming any pleased to have her with him, he was looking some pissed off, but when she asked what's wrong he didn't answer.
She asked to go to India Gate in that romantic weather but he was not interested. Although he took her there, they saw India Gate from the road side in the car, purchased ice-cream without stepping out of the car and came back home.
At home she sat aside and he made him occupied with television. It was the most weird and uncomfortable time, then he suggested to go to sleep and she agreed because it was the best option in front of her that night. It was better to go and sleep then to sit next to each other like strangers. While getting into the bed some conversation started and then it moved on the right track. they had a great time talking, teasing, loving, laughing, cuddling, poking seducing, fighting, caring and whispering. In the morning while she was leaving, she was scared, she was scared that she had spent a whole night without any commitment. She knows they both like each other, she knows that they both even love each other.
But she is still not his girlfriend yet, she still doesn't have a real relationship with him. She went away without uttering a word hoping that things may move on right track after whatever they shared last night. May be he would now be sure about her, may be now he would give her what she needs, may be now he will give her a name, give their relation a name, may be he would give her a relationship.
But..
She was wrong, nothing happened.
Nothing happened like his. He was very casual with everything and when she tried to talk about this he straight away told her that he doesn't know anything, he doesn't wanna talk about this and he still needs time to think.
I just can't understand for what he needs time now. After that night what is left to think about, what is left to feel for and if he doesn't feel it the way I do then why don't he let me go.
Why he wants me to stay when I was leaving if h doesn't love me, if he can't be with me, if he can't accept me.
If he can't make me his girl they why can't he let me go?