The baby looks just like him. Should I continue believing it isn't his?

A year ago I found out my boyfriend was messing around with another female who was allegedly already 3 months pregnant by him. But the whole time he was telling me that it wasn't his baby. i believed him. Until yesterday. . his allege baby mom posted a picture of the baby. The baby has his whole FACE!! same hairline and everything. And now im highly upset... He's still denying it saying, "That could be another man's baby. She was with everybody". "that's not my baby. I barely knew her" the same female he's been trying to talk to before me for 14 years. Smh. Should i continue believing the baby isn't his? He keep saying it isn't and then said to stop watching her page because he doesn't talk to her at all.
The baby looks just like him. Should I continue believing it isn't his?
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