Husband of 20 years caught flirting on playstation..Do I have a right to be this angry?

ok this is tough for me...but my hubby works long hours and doesn't get home till late...i try to stay up with him and have time for him but we also have small kids..so I have to get them up for preschool and school early so its hard to stay up late..anyway to the dilemma..i dozed off on couch other night and heard him on call of duty talking to a girl...and something didn't feel right(instincts) but I dismissed it as just the game and just conversation..so next day when I looked I saw that he sent her messages telling her she sounded really cute and her voice was "inspiring him" ...we have been married 20 years and this crushed me...am I overreacting? when I confronted him ..he acted like he didn't know which messages...and then we didn't talk rest of night..i went to bed and woke up a couple hours later and he was playing the damn game again and she was on there again...so that was a total slap in the face...;so what do I do now? keep being pissed ...i mean he didn't even acknowledge it or apologize...this is so out of character for him ...i think but I'm not sure anymore maybe I'm living in dreamlife and didn't realize it ...HELP!
Husband of 20 years caught flirting on playstation..Do I have a right to be this angry?
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