It is true that you can judge which lady takes interest in you by noticing your groin. This reminds me an interesting news about a person who was examined by airport security people seeing his groin, thinking that he is hiding some weapon. It was found to be his genital. He did say such episodes do happen some time.You will attract person who is interested in person like you.The above is a practical suggestion.
People pretend that every penis size works with every woman. Every woman is different also, and she is much less aware of her size since it is hidden. Therefore yes you may intimidate women and have them refuse you, but men on the other end of the spectrum also have problems. People don't understand your complaint because all men think bigger is better and a big ego goes with it.
Get to know women as friends and watch which ones are checking you out with interest. Be polite and do ask them out. You just have to be prepared for sex to be a challenge sometimes and work other times. It's just one of the challenges of life to find a partner that works both physically and in personality. There are women that can accommodate you, but those who are inexperienced will have no idea, and you aren't the best one for them to start with.
Try different postures. Vagina is elastic. it will adjust to the content. If you go slow and in a controlled manner, woman may like you.You need not talk to your friends on this subject. You are likely to be misdirected by your friends as this subject is altogether different.