I don't feel good enough for this guy I'm talking with what should I do?

he's doing a biomedical PhD at university and I feel like maybe I won't be intelligent enough for him. I only did a business degree at university and working in marketing. Despite that I have my own life like I'm travelling, in very decent shape and volunteering at large sports events
I don't feel good enough for this guy I'm talking with what should I do?
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