Withdrawal Method & on BirthControl Pill

Hi all! So my boyfriend and I have recently starting having sex. We use condoms and I am on the pill, and take it regularly every night. But this past week we had sex without using a condom. He only withdrew before his full "climax". Do you think it's ok to not use condoms while on the pill? I am not worried about STDS (we are in a monogamous relationship) and we have been together for a while. Opinions? Thanks!