Is it a phase? whats going on with me?

I'm 19, didn't get any same sex feelings until.. 2014. I also think I have feelings for someone I know.I think i had female attraction, but now I'm not so sure. I mean, thinking back I only really looked up porn for anal and big dick porn and stuff, could rarely find a woman alone I could jerk off to. I think I had a lot of crushes on girls in high school, but at this point I can't tell if I was actually interested in them or just wanted to be friends. Also bought a dildo and chastity cage and use it a lot, would that affect anything? I'm just very confused lately. I mean sometimes I think it may be confusion over myself. I'm incredibly underweight/feminine looking and maybe it has to do with self confidence of not being manly enough. I thought I had an idea of my life, having a wife and kids, but that's just faded.I really don't know, maybe it has to do with self confidence being all fucked up? I was talking to my mom a 3 weeks ago and she asked if I was gay practically and I didn't answer, just felt very ashamed about it.What can I do? Is there any advice or tips on what's up? Am I really gay?