BF going out all the sudden

Opinions.... my bf went out before we started dating and hasn’t since. The last few weeks he started going out all weekend.. dressing up.. staying out all night..he doesn’t communicate where he goes or with who. Of course if I did that it would be an issue. So Saturday night we get into an argument and I go to bed around 12 . Said he wasn’t doing anything then the next morning I find out he decided to go out till four am. He hasn’t made any effort in months to even dress nice or a date for us. But he got his hair cut and dressed nice for the club. He would definitely think I was up to something If it was switched. Am I over thinking?