I’m not really sure what to say.. I need help

question: how do I tell my one night stand (friend) I’m pregnant with his baby..

rumours got spread he asked me 3 weeks ago if I’m pregnant and I said no.. I was scared..

Information: I am 7 weeks and 3 days pregnant. I have spotted a very little bit through out the last 3ish weeks, but nothing to raise concerns. No cramping, no pains. I have seen my baby about a week ish ago.. but still worried I’ll miscarry by time my dating ultra sound comes around in 1 week 1/2ish..