Why can I not connect with other Black American males?

I am a 21 year old male who is half black and half hispanic. Recently my girlfriend brought it to my attention that I seem to have a problem clicking with other Black American males, and I don't understand why. Im not a racist at all, I love diversity and other cultures, I get along with Jamaicans, Trinidadians, Africans, Hispanics, pretty much all other men of color from other ethnic/cultural backgrounds. But when it comes to African American men...there always seems to be a problem, some I get along with, but not enough to form a friendship, we never seem to have enough in common...and I notice 9 times out of 10 whenever I have a problem with someone( which is rare)..its a black american male. Ever since I was little, when Im with my mom's side of the family(the black side) I feel akward around alot of my uncles..except one..and he is Somalian...however on my dad's side (hispanic) I get along with everyone..I recently obtained a good friend in college...and I thought he was black american...therefore removing my stigma of me feeling like I have a problem with my own people...but it turns out he is 100% Afro Colombian...which isn't a problem...Im just curious to know why I feel akward or out of place when I try to hang out with or form relationships with Black American dudes??Im from a New York City, so i've grown up around all races and cultures.I went to a small private school in Long Island that was perdominantly Black American, my close group of friends were South African, Jamaican ,Hispanic and White.Also, its not like I'm clearly mixed. It seems like the only people that know is other black people, who say I have "good hair"..and "nice skin"..which I find kind of crazy, because I don't really see a significant difference between me and other black guys, which is why it puzzels me that we don't connect.