How to get past the thought that she might be seeing other guys at the same time

Hi everyone! I (24m) have met an amazing girl (24f). We have been seeing each other for 2 months and things are going great. When we are together everything goes smoothly and we have a lot of fun doing anything together.

The problem is when I’m not with her I can’t stop thinking that maybe she is having other guys over. We aren’t to serious or anything. This is 100% my own thinking as she has not given me any reason to think this, But I’m just struggling getting past that thought.

I know it’s really all in my head but it’s making me have anxiety about what is really going on. I feel like if I ask her it will make her angry or make her feel like I’m not confident in myself. How do I go about addressing this situation??

Thanks