So next month is my boyfriend's and I's 4 year anniversary and I have no idea what to get him. He is…

So next month is my boyfriend's and I's 4 year anniversary and I have no idea what to get him. He is so picky about some stuff lol that I have the hardest time shopping for him! You'd think after 4 years with someone you would know what to give him but nope I don't haha. It's even harder since our anniversary and Father's day is like a week apart (I know what he's getting for Father's day). So any advice on what to get him?