I'm going to ignore what my wife has to say about me continuing to box.
I'm not really sure why you would ignore her input? Do you have a reason for this?
Yes, I don't give a shit about what she thinks because I feel like boxing is all I ever wanted to do
You should listen to your wife's concerns and reassure her because her concerns are likely valid. However, you are right to continue persuing your dream. Talk to your wife about your passion for boxing and why you can't let go of it.
Nah, I'm going to do whatever I feel like.
Your wife loves and cares about you, so you should speak with her about why you love boxing so much and hope that she understands. Only caring about yourself will ensure that you end up alone.