I feel like I'm missing out on the full feeling of a 8inch penis, tell me the difference PLzzzz

I`ve had three lovers in my life and the biggest of the three was my ex hubby just at 5.5inches and 5inches in girth before my bf now witch is almost 4.5 long & just 4.5 around . I noticed the difference the first time he put it in and I was let down but did not care cuz I don`t now what 7+ feels like. I`m really tight and had a C-section so I`m not worried about girth but the longest thing I`ve ever had in me was my slim vibe that was 6inches that my ex got me. I could put it all the way in till the turn dial on the end was inside me no problem. I`ve looked it up and found that some of us love the deep sensation past the cervix on the posterior fornix that causes mind blowing orgasms for some. I get hit on all the time so I`m good looking but not a cheater. My friend asked me how big my bf was and I lied and said 7"long and 5 around cuz I`m afraid someday it might come out and crush him. My friend said "wow he`s only a inch smaller than Mike witch is just shy of 8 but a little thicker and he really wants you bad. So am i missing out on some good sensations/orgasms and should i try it out ? I told her that's scary but she said when he bottoms out he knows just the right amount of pressure to cause no pain and only pleasure. And could someone describe what its like to orgasm vaginally from a big one, and how big does it have to be for you personally to reach your deep spot to feel it at it`s best ? PLZZZ I came across this sight and was relieved to see I could get some answers with out someone trying to sugar coat it cuz guys read it too. read other threads on sensitive size topics with out the sugar coating so I feel good about this site.