Was I over reacting ??

So today my boyfriend told me he had a job interview and when I was leaving to drop our son off I seen him leaving from his other children’s mom house and me and him got into a huge fight because he did not communicate with me and let me know that he was going over there the argument was so bad I packed his things and told him to leave and we have a son also and when he was leaving he was talking a lot of shit, like shit he ain’t never said to me before even told me he regretted having a son with me and mind you me and him have been together for 10years this man has had a kid on me and all and I still stood by him and then he told me he got the job but I’m still mad asf at the fact he didn’t tell me and I literally saw him leaving like I don’t get it