Bethenny Frankel is officially going public with her new relationship … and packing on the PDA in the process!

The former reality star hard launched her new boyfriend, Shane L. Campbell, on Saturday … sharing a sweet snap of them locking lips.

She joked about going Instagram official in the caption, writing … “If a launch is hard this is a diamond.”

Romance rumors about Bethenny and the Miami investment broker first started swirling last month … but this really seals the deal.