I got stupidly hurt when my partner picked a npc to be his wife
I hope you are joking. Why did he pick a NPC?
I think he was mad at me.
It's okay to be upset when your partner doesn't pick you. You should talk to him about it. NPCs aren't real, so you should try to not be so offended, though.
I'd rather focus on real people and how to level up my health, that way I'll be less upset about this.
I think it is understandable to be angry when you have a partner that is not paying attention to you.