Don’t ever second guess yourself now your worth. If you have not seen him in awhile and you seen those condoms last time you was over their or even if it’s a new pack and you know yall didn’t use them. Sit him down and talk to him about it. If you’re in a relationship and second guess anything don’t be worried or afraid to bring it up. This is just me on this part because I had a similar experience happen not to long ago. Honeslty what I would do is ask and go thru his phone and don’t leave anything out even recently deleted messages but just talk to him first then depending on what he say you can react
I would def not sleep w him in case he’s fooling around. Maybe wait and see how it plays out or see if any others go missing . If it’s too much to have on your mind I feel like it’s okay to just mention your concerns or question it . Better safe than sorry.