STD testing

Pl
Every time I go to the doctor they tell me I should get tested for STD's. It's not something my insurance covers so it would be an extra $45. I've only ever had sex with one person and he's only ever had sex with me. Is it worth it to get tested? I've never had any symptoms of anything. I just feel like it's a waste of money but I could b wrong. What do you think?