My (23F) boyfriend (26M) started dating me over a text he sent to the wrong person and I feel like I was deceived into dating him. How can I approach this with him?

So I met my now boyfriend through text message. We were texting for a couple of days before meeting up. The first couple of days he seemed really nice. I agreed to go out with him and meet up. We went to a park and he seemed pretty normal. Not once did he mention to me that he messaged the wrong person. We continued to go out. We've been going out for almost two months. When were at the park again, he showed me his phone of him sending a text to the wrong person. The text he sent was very flirtatious and sexual. I didn't think much of it because I thought he meant to send it to me. He told me that he accidentally sent it to the wrong person and that person just so happened to be me. When he showed me his phone, you can still see the green text of him sending that flirtatious message to the wrong person. I'm just confused on how he got my number. My number is not a new number. I've had it for years so I don't know why he had it in his phone. He also didn't explain to me on how he got my number. I feel very deceived that he would lie to me by saying he messaged the wrong person when clearly he messaged me on purpose. I feel like he lied to get me to go out on a date with him. I have trust issues and this just makes it worse. I don't know how I should approach him about this without being accusatory. I don't want to end the relationship because of a misconception.