My boyfriend thinks he has autism

I just wanted to put this somewhere. I’m diagnosed with autism and adhd. My boyfriend claims he might have autism. I always thought he didn’t have it because he doesn’t show any major symptoms. I asked him to list the symptoms he has and I feel like they overlap more with adhd rather than autism. I want to tell him but he might not have a good reaction if I give my opinion. It’s been weighing on my mind and I just wanted to say this. I’ve mostly been scared of his reaction. If I just outright say “I don’t think you have autism” he might get mad and say “you don’t know everything about me so don’t give your opinion when I haven’t even told you everything”