What it means when a ex-boyfriend say I hope you and so and so have a swell relationship?

Anonymous
Recently me and my ex boyfriend were just bestfriends I know we both ruined our friendship by taking the risk even tho my parent told me to NEVER date your friends.. but me and him liked each other until he broke up with me because of my emotions of him talking about other girls in front of me in a psn chat party.. and his life issues.. where he told me he do miss me but he doesn’t want a relationship until he get himself back on track.. well I found out he was trying to hit on different girls so to me it felt like he left me to get with someone else.. but once I moved on he told me “I hope you and my current boyfriend have a swell relationship..
What it means when a ex-boyfriend say I hope you and so and so have a swell relationship?
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