Seriously???

I agree with whoever said you both acted in the heat of the moment!

What would anger me THE MOST is that why does he feel entitled to YOUR bonus check? I understand when you live together your finances are intertwined and it is totally fine but at the end of the day you should be entitled to make the final call on how your money would be spent no? Why is it an argument?! If he wants to spend his bonus check on it.. You might not agree, or even think it is stupid, but it would be up to him... As long as it doesnt take away from bills, mortgage and wedding expenses (especially if he is the one who wants it).

In your description of what you plan on spending it on, you mention paying off bills and paying for some of the wedding stuff - things you both benefit. No matter which way you look at it - you both benefit from that.

He on the other hand wants to spend YOUR money on something he wants that is in no way a necessity. How would he feel if you went and spend his bonus check on a new necklace? Or your wedding dress?! How would he feel then?

I would tone this down a whole lot and maybe try and convey this to him emphasizing how he would feel if tables would have turned.

I definitely don't think that you are wrong. It sounds like you guys are sharing money. My FH and I share money to an extent but mostly just for bills and household stuff. When I get a bonus or when he has extra money, we spend it as we see fit and don't involve the other person unless something around the house is being neglected. If the two of you are committed to splitting money, you all need to be sure that you agree on where the money should be allocated. Until there is an agreement, don't spend it on anything.

Seems like the stress of the wedding and normal life stuff is bubbling up. Take a deep breath and maybe strategize together!

If you really have six TVs maybe sell a couple to purchase the new one rather than it coming from your bonus and/or have that go to the wedding too! I suggest talking with your FH once things have calmed down. He may have agreed to purchase a TV instead just to be difficult and lashing out. Bills can be stressful and so is wedding planning for sure. Have you planned to do any premarital counseling? I know its pretty common with officiants to offer packages. Might be good to have a neutral party to help facilitate and come to strategies for bills and communication.