What are the signs he is about to propose marriage, or he is thinking about proposing?

Why do you want to know? Is it not better to be surprised?

He tries to measure your finger when you are alseep.

All relationships are different I don't really believe there is any one sign for anyone

He takes everything he has and splits in in half. Trades in his favorite car for a minvan, takes his social life and locks it up like Fort Knocks ;) You never know

what are the signs he is about to propose marrage, or he is thinking about proposing?
When he proposes you will know...

Don's second guess... it can drive a woman nuts... it's called PBT (pretzel brain twisting) and it's not good for your mental state...