Is it possible to be lonely until you die?

I was listening to "Unil I die" by NB ridaz. And my personality has many faces. And I'am quite different in person. I can be mellow at times and happy and goofy in other times. Then just depressed I don't want to deal with people. I have friends, good ones. Sometimes I think "I wish i had their personality" and I feel inferior to them so I get jelous. I place all my anger on working out due to stress. It helps. But sometimes ppl look at me like there scared or something with my presence. I am 6'2 190lbs. I do have broad shoulders and I am aztec. Then I thought if this goes on maybe i will die because i am not good to anyone? Don't get me wrong, I had girls say im hot, I guess to them but i don't think so. But nothing ever happens and girls I do like reject me. Is this possible to live life and die a loner?