Confidence is a good quality, be confident from now on in all fields of life.
If we ask for it, we may get it. If we don’t ask, we will never get it.
If you believe you can do it, you will do it.
Never cry over spilled milk.
There is plenty of fish in the ocean. Never get too attached to one fish (or human or item).
“Those who are on this path are resolute in purpose, and their aim is one. O beloved child of the Kurus, the intelligence of those who are irresolute is many-branched.” (Lord Krishna, Bhagavad-Gita 2.41)
A follower of Lord Krishna should have very strong faith that by worship of Lord Krishna and following His instructions in the Bhagavad-Gita, one will be elevated to the highest perfection of life.