What is wrong with me I'm unhappy I went out with the kids dad yesterday we hanged out without the…

What is wrong with me I'm unhappy I went out with the kids dad yesterday we hanged out without the kids ate and had sex he got us new phones then i got home we cleaned i went to volunteer in the office but when he picked me up he acted so rude with me when he saw the boss was a young guy and I was talking to him about an issue at the office. The dad of my kids came in didnt want to come meet the lady boss and was rushing me out I know they heard in the office and i have not recieved an email to come volunteer again since should i be worried and sad about this or let it go ?