Lost my virginity to her fiancé

The guy I lost my virginity to six months ago just texted me. We were only together three months and then he disappeared in August and just sent me this now. Here’s where the complications start...

He doesn’t know I JUST found out (maybe two weeks ago) he had a fiancé the entire time.

I don’t know whether to ask him how Sara’s doing or just not even bother wasting my breath.

I’ve debated contacting the fiancé but by the time I found out I had already deleted our messages and his number, and started trying to move on. And trust me, he’s really convincing.

I need advice on how to proceed. I will not be the girl an engaged man sleeps with, but I’m stuck between asserting myself (for me and her) or just ignoring him when he responds?

Update/Response:

To you it may be unnecessary drama, but this man told me he loved me and was in a relationship with me. It wasn’t just sex to me, and half of me thinks it wasn’t for him either. That’s why I’m hell bent on doing something.

I took your guys advice on having him admit to things. He told me he wanted to fuck me and that’s why he was messaging me.

I am telling Sara and I’ve screenshotted the messages where he’s telling me he wants to fuck me.

Thank you guys for your advice, and to the rude comments: I’m not a home wrecker, I didn’t know. I genuinely cared for this man with all of my heart and I was crushed.