I need some opinions on my marriage?

I have been dating this guy for 5 years now. We recently got married in March. When we first started dating, everything was very nice. He was quiet, shy and sweet. We both went out on a lot of dates and were very affectionate with each other. After some years went by, things started changing a bit. We started going on less dates, sex has been dwindling down, etc. He caring less and less about what he says to me (hasn't called me out of my name yet) but he goes a bit too far when he jokes and when i let him know that, he gets all defensive about it. He tends to hide his phone a lot when im around. He's starting to not care about his personal hygiene that much. Im starting to feel more down because our relationship is not what it used to be...

I'm starting to wonder, did I make a mistake going through with the marriage?

Try to stay a bit longer and work on the marriage
Just get out of it. Don't waste any more time
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I need some opinions on my marriage?
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