If you don't like your best friend's lover...

He is loud, rude, jealous, annoying, and you wouldn't even be surprised if he cheats on her too. cheats as well. In short, you shouldn't like your friend's guy, no matter how mean it sounds. A shitty situation? Quite. How do you deal with it? You can read about it here.

Ho, ho ho. Before my bestie has a heart attack and thinks I don't care about her boy at all: don’t worry. Jan, I love you. But I have seen men in my circle of friends and family that made me think: eh, no. What on earth does she see in him? It's not really nice, but you can't get along with everyone. Step 1 is to think about why you can't stand your friend's partner.

And so it's time to outline the three most common situations and especially: how to handle it. You can't stand him because...

...he treats her badly

If she comes to you crying every week, then you have every reason to find him a jerk. Why she stays with him is a mystery to you, but what's important is that your friendship doesn't come under pressure. Let her cry it out, give subtle hints here and there that she deserves better, but try not to judge your friend's love choice. One day she will figure it out, and then you'll be ready with that bottle of wine.

you at least have a beautiful common love

...your characters clash enormously

Does he not treat her badly at all but do you just think he's a total loser because of his behavior? Do your characters simply clash? Then the situation becomes a bit trickier. In that case, I would advise you to avoid him a little. I mean: meeting up with the three of you isn't necessarily needed. Just don't speak too badly about him to her, because then the chance is greater that she will get defensive and you will have a fight. Also, remember that you don't necessarily have to be friends with your friend's lover. What you can do is at least tolerate him to avoid any explosions.

...he ‘takes’ all her time’

The chance is big that you are afraid of losing her. Because of that, you tend to engage in a battle with him for your friend's attention. Sometimes it can jealousy actually be a beautiful and cute emotion. Bet that if you stop pulling and battling, she will call you more often? Just stay your lovely self, it will be fine, trust me. And finally, remember: you at least have a beautiful common love. Maybe there's even more to discover that is quite okay about him. Good luck!

source: Ghiphy