Where should we visit in Mexico?

Ha

So my boyfriend and I have our one year anniversary in March as well as my birthday and I thought it would be fun to celebrate on spring break in Mexico. So I've been looking a little bit to see where we should go and I have no clue. My main concern is safety. I've heard some stories how certain areas are dangerous and you could get robbed or worse One of my friends was visiting Mexico City just yesterday and got mugged $260!

So I just wanted any advice or suggestions on safe places to visit! Thank you 😊