I think my boyfriend should be tested for aids
Why do you want him to be tested for aids?
I can't tell that he's health just from how he looks right now. I need him to get test so I know he's safe.
It's understandable to be concerned about your health when it comes to a sexual partner. They may think you're being unreasonable if you ask them to get tested though without any indication of them being ill. Unless they really care about you, they may not comply and could possibly end the relationship.
I'd rather be tested for HIV than die because I was scared to ask. It's worth the chance of losing him.
I think it's great that you feel comfortable enough to ask him. Your health should be your number one priority, and this shows that it really is for you.