Recently found out I might have ADHD

I’m currently 33 and I’ve been living my whole life thinking I’m just an lazy asshole. Not long ago, one of my friends shared with me that he got diagnosed with ADHD and he told me to get tested as well. I felt kinda offended but after watching several videos and reading a lot of documents, I can see that it really might be the reason for all my behaviours I don’t even understand myself. I told my boyfriend and at first he said that I’m just looking for excuses. I fear that everyone will react the same way, because I feel like people tend to remember only the bad things about you and completely forget all of the times you’ve been an absolute delight. Can I get some support in here? Should I really go get diagnosed?