Blowjob

Noël • Registered Nurse • 28 •
Okay so I know this sounds like a childish question. But basically I've been with my boyfriend for 3 years and we're crazy about each other. We've been sexually active for about a year now. 
I enjoy giving him blowjobs, however I've never let him finish in my mouth. Got me personally I feel like it's a real objectification of who I am as a person.
He's never pushed me about it but I know it's always been a sexual fantasy of his. He's always assuring telling me that if I feel uncomfortable with it we won't ever have to do it. I can't help but feel like I'm letting him down. 
Is it wrong to feel like this? Should I just give it a try for him or should I stick to how I feel about it?