Long story and weird question (TMI)! 😂🙄😪

Okay. So im going to start on the story first just to let you guys understand this a little better lol.

So me and my boyfriend have been together for almost 4 years and been having sex for 2 and 1/2 years so we wanted to try something new, so we asked my boyfriends friend (18yr old) to buy us a vibrator... well my boyfriend asked but I told him to lol 😂 and so his friend agrees and then comes out of the sex shop with a dildo my boyfriend said 😂 so he tried to return it knowing I wouldn't want that but you can't return those apparently 😂 so he went back in and bought a blue glittery vibrator. Idk who doesn't know the difference between a vibrator and a dildo 😂😂 but I ended up with both at the end of the night .

But any way (TMI part)

I had put them in the drawer across the room and I grabbed the dildo jokingly and laid on the bed with my boyfriend and was like messing with him with the dildo 😂😂 he didn't find it Funny but we started making out and my pants ended up coming off and he turned off the lights and started to eat me out... and unknowing/unexpectedly he grabs the dildo and sticks it in me as he eats me out. It was actually so bomb. I felt like coming and I came super close, which Is where my question comes. With just my boyfriends dick I can't come that close to coming and it's bigger than the dildo ?? Why is this :(( it kinda sucks