To the original post, you say he leans back from your jab.

Unless you're getting countered I don't see that as a problem.
The idea is not to get hit and if feinting a jab prevents damge, then flick it out there.

Its your subsequent punches I'd be more concerned with landing.

If you circle right, keep on point and throw a fast jab, you shouldn't be too concerned with his right hand.