Advice please

How can I tell my boyfriend that I want to use condoms? We been together for a year. Before that we were fwb and we were using protection. But since we been in a relationship, got tested and everything. (We both came back clean) we haven’t been using condoms. Now I want to use condoms. I don’t want him to think or get offended. But this is something I’m doing for myself and honestly i want to use condoms ! Birth control gave me breakthrough bleeding and every since I been nervous to go back