Over reacting ?

Stephaniee • In love with life even after all my falls ! 💘
I don't want any rude comments I just need to get someone else's opinion... So me and my boyfriend have been together for only 5 months but we talk about wanting a future together & he's always telling me he wants a baby. But earlier today we were on the phone & he said he had to go because he was gunna go eat lunch with his dad & little brothers & I thought he was saying the truth since he was on his way to cicis pizza, but about 25 minutes later I see a video on snap chat of him being on facetime with his ex he was with for 15 months! She's younger then both of us but I can't help but to be jealous of her sometimes! I told him off and here are the texts... 
Do yall think I was over reacting ?!