What should I do?

Okay so i like this guy and we used to talk and stuff, i told him i liked him and he was fine with it. He already told me that he liked this other girl, then i talked to him one day and he said he didn’t like her anymore. But now they’re going out. She isn’t that pretty, but she is shorter than him, where as i am taller. I don’t know what to do. My lip started bleeding today because i accidentally bit it too hard while i was watching her wear his hat. i have no idea what to do, i still want to talk to him, but i don’t think i can, please help me!