We all 'miss' someone now and again. My advice to you were to be, to live life in the moment. If you are not in love with the person, move on. Where is this person you are thinking about? Unavailable? Why are you wasting your time thinking of somebody else, who may not be thinking of you? Don't live in fantasy, live in reality.
File a missing persons report.
You can't really unless you hide the pain.
Nope!
Usually not. It's usually with someone who is not like his spouse.
no
No. A spouse or ex spouse cannot get an order to prevent you from seeing someone else. They could get a no contact order to keep you away from them but not someone else.
A contrarian.
No, it is not wrong to lust after your spouse.
A widow (woman) or widower (man) would be someone whose spouse had died after they were married.
Your spouse teasing you or not talking is common. They are feeling left out as you are cheating on someone else.
A spouse is almost never responsible for the expenses of a deceased spouse. However, if the deceased spouse had money and there will be probate, someone may make a claim against the deceased spouse's money in probate court.
It is very common for the spouse to be the executor of a will. They can always decline the responsibility and the court will appoint someone else.