How can I show affection to my boyfriend?

Just to get this out of the way, we're both males haha. Just because usually on questions like this, people would mistake the asker to be female, but yes it is a homo relationship. Anyways, so. My boyfriend. He's a sweet, goofy, charming guy. He tells me good morning, calls me beautiful, always tells me how lucky he is for finding me, and overall is like a master at showing affection. Even on our dates, he always initiates the first cuddle/kiss, even telling Me "You don't have to wait till I kiss you to kiss me back.". Clearly showing me that HE himself desires to be the one having the affection initiated on. The problem is, my own pride/embarrassment. I'm an awkward mess, believe it or not. I overthink things. Either thinking my breath may stink, he may find my affection annoying, or I'm just too...ugly? (I'm not ugly but damn, my mind screws me over 24/7). My best friend invited us over this weekend for a sleepover, and we will both sleep on the living couch bed alone. So it's the perfect time for me to cuddle with him and show him affection. Like, I want him to be the one who gains the butterflies. But how can I do so without being nervous? I know I should clear my head and relax. I've had issues with anxiety and I do overthink everything. I just want to love him, and show him that I love him. He's such a great boy. Any tips? (Please no Homophobic answers as well. I know I probably won't get some, but there's always That ONE person.) thank you!