I can't tell my boyfriend I'm pregnant

Hes anti abortion and we're planning on getting married and having kids but I can't yet. Financially and emotionally I'm not ready. 4-5 weeks. Is it morally ok to get the abortion pill and not tell him

Edit

I just want to clarify. Hes a wonderful man and he is pro choice but is disgusted by the act of terminating. He wants there to be a choice but he can't handle it Especially if it were his. He knows women deserve the choice and pregnancy should never be forced. He just doesn't feel right about it.

I also know he would leave me if I did.

I'm the most conflicted I've ever felt