Regarding how to handle the relationship with your brother-in-law, it is actually neither difficult nor easy to say. The main thing is that you have a good character and are worthy of his sister, and you have a correct style of conduct. The most important thing is His sister feels happy to be with you, and he will feel it and see it with his eyes. You can't fake feelings. If his sister is happy, he will definitely have no problem with you. There is nothing wrong with you, not even your brother-in-law, no matter how messy. You know how to behave!

Secondly, if you want to have a good relationship with your brother-in-law and become buddies, the most important thing is to do what he likes. Sometimes when you go to his house to send things and gifts, don’t give them randomly, and keep the content of the chat with him , and talk about it based on his preferences, which may ease the relationship and make it less awkward. Then you can get to know him better, and he will also get to know you at the same time. If you have similar views and get along well, you will definitely become buddies, and maybe you will If you have a little quarrel with her sister, he will still help you. So, it's definitely okay to treat it with a normal attitude and don't look for trouble yourself.