@elefantine97 I know it may sound empty from a stranger on the internet but 3 months can still be considered short. Everybody heals at different paces I have felt similarly before and my biggest heartbreak took a year and some soul searching to heal. Don't lose hope of love and stay strong.
The boss is such a piece of shit. Goes on a date, reject him saying she has a boyfriend and now acts like she has the right to feel jealous. Kindly fuck off.