guys here, help me understand

so my guy do go down on me and don't let me go down on him as well, like he was one time down on me but he just give me a vg kiss and it was just that and he let me do bj on him a few times and when I polite told him to not cum in my mouth the next times he didn't let me go down on him and when I try to he only let me do stuff with his underwear on because when I try to do the real thing he stop me..

so guys here just help figure it out why he is acting like that because I've talked to him and he just don't talk to me