I’m about to turn 19 and ...

I have never kissed a boy nor have had boyfriend , I never really cared for it but lately it has just being bothering me. Its not like I haven’t had the chance but somehow I always end up messing up w boys or I just don’t feel the same towards them. In 18 days I’ll be 19 and I feel like a loser . In all aspects . I don’t know what to fix of myself I swear I try. And i am just tired of always feeling unappreciated.