Overreacting to boyfriend going out at night?

My boyfriend of 5 years (we live together) has been going out at night when I am asleep but doesn’t tell me. I’ve found out weeks later from one of his friends that they were out.

My boyfriend is usually already intoxicated when he walks down to the bar. He rarely remembers what happened. The friend has said that he has gone down when he was in his pajamas, gotten kicked out of the bar and tried to get into it with some guys in the past).

I am extremely hurt and angry and seriously questioning our relationship future because:
1) it feels like my boyfriend is sneaking out at night
2) He never told me he went out & learned from his friend
3) he doesn’t even know what he is doing when he is out because he is so drunk

We have had significant issues in the past and us working through things was an agreed “no lying about anything” policy.

Dear readers - your opinions please!

1) am I overreacting to lying, drinking & sneaking out? (In my opinion)

2) is not tell me that he went out in the middle of the night basically the same thing as lying?

Thank you lovely people!
Overreacting to boyfriend going out at night?
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