PLEASE HELP. Penis size trouble ??!!!!Or no ? :/

Hey guys. I’ve been with my man for two years now and it’s really serious. We hav beeen talking about marriage and everything. Only problem is his penis size. It’s not that small , but I have always been with bigger. I measure him twice a long time ago and the first measurement was about 6in or right under it. The second measurement I didn’t months later was a little around 5.5in I think. (Yes he let me measure him). Our sex is not bad , but sometimes I feel like it would feel better if he was a bit bigger. Don’t get me wrong , I do orgasm from clitoral stimulation , but never have just a regular orgasm (I’ve never had a regular orgasm with anyone else either). It’s just some days it’s good and some days it’s just ehhh. About 60% it’s good and 40%okay , but I don’t know if it’s every OMG SO AMAZING because I always feel like he’s not big enough compared to my exes. Don’t get me wrong , my exes were bigger but they weren’t better ; but I just feel like if I had a little bit bigger , it would be more satisfying. It’s really hard to explain. I sometimes feel like the only reason I don’t always like our sex is because I KNOW that he isn’t that big; so it’s like more of just a mental thing if you get what I mean. and from me watching porn , seeing bigger men , I just feel like I’m missing out on something. What should I do ? Don’t want to marry him then years later regret it because of the sex. Any advice ladies ? Yes , certain sex positions feel better ; but I really just want a full orgasm instead of just clitoral orgasm ! I did some research and found that there are different types and that a vaginal orgasm is way more powerful that clit orgasm. So help me out ladies. Thanks