Cherry, As Vanilla said, you have no reason to feel shame or embarrassment. You hold your head high and proud, you are magnificent.
I think choosing to go to coffee breaks and out to lunch with friends and colleagues is a great idea. The less you obsess over the situation the better, healthier for you.
M 10yrs T 13yrs BD #1Oct 2015-PA between WAH and COW BD #2 April 2016-WH resumed PA, she broke it off Jan 2 2017 WH says he wants divorce April '17-Letting go 2018 D busted DD8, DS6, DS3