what's up with him

O.K. my boyfriend tells me sometime to do something and I do it but if I ask him to do something he ask a lot of questions like one time I said I need $5 he ask why I said I need to buy something he said a lot of questions about it and he said I will think about it and I said will you know what I think I will ask my friend he will give it to me he was mad at me he told me dont do at I say no I you go to him I will give you $5 but it like I ask one thing its no he asked something I say no his mad and he tell me please or something all day so I say yes and his happy why cant he do something for me.