Thank you for your interest in a position in my group. Your preparation and credentials and impressive, and your research interests would certainly be a good fit with my program. As such, I would be interested in exploring the possibility of you joining my group. However, decisions on admission into PhD programs are made by a committee rather than individual faculty, and you need to formally apply. I would encourage you to apply in the next cycle for which you are eligible, and if you are granted admission and choose to come to BU, I would be happy to talk to you about potential opportunities in my group once you are on campus.
Wish you the luck in your search for a suitable graduate school.