Is it normal that my boyfriend is acting this way?

So iv been with my boyfriend 3 years on and off, we always fight and argue but lately he has changed he never says sorry first or never backs down and gives in . He constantly wins every fight even if he is wrong! I used to be in his position but now it's the other way! Yesterday I left his house I was pissed off over something stupid he did. So I waited and waited for a text from him but I never got one so I called him and text him too many times. I started to get upset and worried so this morning I did the same he finally answered but start telling me to go away I was annoying him and he didn't wanna talk he needs space and everything. I really don't wanna lose him and I asked if he still wanted to be with me he said yeah he just needs space I was annoying him because everyday I fight with him , iv been crying constantly because he won't talk to me and it's really frustrating because i feel I did something worse and hes not telling me .. But I don't think I did! I can admit that I was annoying because I have been picking fights but iv been emotional. Lately he is always going out with friends and neve has time for me and when I confront him about how I feel he says I talk shite.. Maybe I am a bit controlling but iv my reasons yano:/ I no he doesn't wanna talk to me now and I don't no how long it will last but I'm really upset and it's killing me :( I'm fighting so hard not to text him again because I'm afraid is  I keep texting him il push him away further. Any advice for me ? Ps. I really wanna resolve this issue without breaking up I'm gonna try change and become less controlling :/ x