Coming out to Gay friend. Any advice?

So... I am 20 years old. Never date/Kiss/etc. Knew I was Gay since 12 and come out to my family at 18. Very supportive (I love them, they love me) but not trully convince I was saying the truth. (I like watcging gay porn, don't stand watcging straight porn, like a few Friends who were never girls, etc. So to let you know I am sure I am gay). But... My family has a lot of power over me (always with the best intention, It Is truth) and kind of convienced me to Say norhing about my sexuality. And so it been two years, haven't talk about it again and for every outside my 6 member's family I am straight as hell (I don't talk a lot about sex, but honestly even gay sex gets boring after talking a while I think) And so on But getting sick of it and have this friend who Is gay (not in love of him) and want to tell him really bss my situation. But.... I am truly (please don't laugh) scare I end up with a girl or so after telling everyone I am gay. I don't know wath to do. I am old fashioned and just wants Friends and fall in love (and have sex with That person if I can open myself to him) I don't think I am bisexual, cause I never felt atracted to any girl (only can Say they are cute) but like melt for guys on web But.... (Again) I don't know if I see my future with a boy or girl Next to me Starting to think about other sexualitys un the list bit really just don't know Should I talk to my friend about this? I think I want to. How could I do that?PS: I want to do it casual, but every time there Is a chance I frezze and start talking a future with a girl.