Your relationship sounds pretty good, so no red flags there. Helo is correct that opening a damaged relationship only worsens the problems, but that doesn't seem to be the case here.
Nor will it enhance your relationship, necessarily. Sometimes they correlate, but I don't think it's causal.
If your boyfriend is supportive of the idea and you want to try it, I say go ahead.
One thing to look out for is that right now you're just talking about sex, but it's always possible for that to develop into stronger feelings of attachment. There's absolutely nothing wrong with that, it's just good for both you and your boyfriend to be prepared for that possibility.
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker