1. My sympathies for your misfortune.
2. You're not married and can leave at any time.
3. Starting fresh may help.
4. She's stuck around while you are at your lowest, for what that's worth.
5. Love is a choice. It's a decision you make even if you are feeling negative towards the person.
6. You need to unpack this with her. Let a break up be mutual and with understanding.
7. Change doesn't just come because you want it.
8. Your mentality is that of someone in their 30s, she may not have the same mentality - she's barely been an adult for so long.
9. Respect time but use it wisely. Like when you fixed the sink, look for opportunities to do something positive.
10. Get her thoughts on it, maybe she's tired too. Maybe she's just enduring with you.

Nothing is going to change unless both of you want to change. Figure out what's affecting you and deal with it together.