If he were so great, he would have told you he was looking for a deeper relationship than he has with you. Honesty trumps **** near everything.
First, if you own the lobster boat jointly, be darned sure you are involved in the sale (if you don't want to buy him out). Let's just say the trust factor isn't real strong now and why get screwed twice?
Second- re: your sister- why would you want him back?
Finally, the world has shrunk in so many ways. You can meet people globally. After all, he did. You have so much going for you and you aren't limited to your small geographic area.
With all of our running and all of our cunning, If we couldn't laugh, we would all go insane...
"Changes in Attitude, Changes in Latitude" Jimmy Buffet