I could of wrote this myself. My ex left for another women 8 months ago but I only found out about her last week, I get jealous of what they have and same as you don’t really have friends. Advice I was told was always have something to look forward too, could be a trip or something you want to accomplish. Thinking of a new hobby or joining somewhere you enjoy. I have been thinking of joining a gym recently. And talking keep talking on here or other platforms because at the end of the day there will always be someone else with similar experience to offer support