Multiple almost baby mothers

After being with my boyfriend for 3 years I accepted he has one child with one woman but in his past he has gotten multiple women pregnant but they had the procedure done. For me I don’t want kids but hearing that made me feel uneasy. Am I crazy for thinking this is weird but it was in his past before he met me but it’s at least 5-6 women including his first child’s mother. We talked about being okay if a kid came into the picture but then things changed and turned into a definite no more kids ever. Would you be okay with this or would you break things off ?