Are we supposed to lie to our boyfriends/husbands/partners?

My BF and I have been together for a few months. I’ve been with completely intimate 3 men and had a few other guys I’ve done stuff with and I’m 21.

My bf and I were in bed after just doing the deed. We were both naked and he was soft. He asked if I liked his big D. I said I loved it but it wasn’t that big. He is just under 7 inches. But not the biggest I’ve been with.

He completely lost his shit. Asking me who? And when? And if I liked it better? I literally told him I loved being with him. If I wanted something else I’d be with someone else. I had to baby him for 2 hours.

Fast forward to last night. We went out and after we went to his house. I started to go down on him and he couldn’t get hard. I asked him what was wrong. He said what I told him was really bothering him. He has been with many more girls then I’ve been with guys. Was I supposed to lie?