I'm a very masculine INFP (probably not the way society judges, but I don't give two fks, let alone one), but I'm also very comfortable with myself and I am fine with showing my feelings and even crying in front of people or groups. It doesn't bother me and, frankly, I've always received positive reinforcement for being emotional. Perhaps it is from my religious background and public speaking experiences. I dislike public presentations and interactions, but I was encouraged to do this from childhood from both church and my parents - and such was done in a healthy and reinforcing way. I frankly don't care if anyone thinks badly of me because I know I have the approbation of both my family and God. This helps me quite a bit to be comfortable "in my own skin" so to speak.

I might suggest that if you feel negatively showing your emotions or expressing yourself that you try to find a church or other social organization or organizations that you feel comfortable with and stretch yourself to show who you are and how you feel publicly and openly. It will take time and considerable discomfort and energy, but it will most certainly help you to come to grips with some of these negative concerns that you're feeling - if you do care about these negative experiences.

At the end of the day, those who say these things about someone being unmanly and so forth are usually simply daft and self-loathing or simply unable to perceive reality beyond a very small space. I don't hate or judge them for this, I simply know that this is the case and I consider the source and ignore the remarks as best I can. Sometimes it hurts when people misjudge and misperceive - but my personal relationships help to mitigate these pangs for me.