I was sure a project of mine was doomed: though once popular, it was imperfect and there was free competition that was the new darling. Ouch. (Oh, and I was bored with it.) I actually tried to abandon it - scuttle it. Today, it's still making money (a $6,000 sale this month), with almost no work from me, while I concentrate on a new, non-boring project. My experience: feelings of discouragement are not always accurate.

Especially if nearing a scary moment-of-truth release date.

You aren't a slave to the project - talk to your partner, negotiate an exit for yourself (with an option to stay).