Confused

So .. I’m 17 might be young but this is what the group is for , I’ve been with my boyfriend for 2 years .. we have been ttc for 1 yr and nothing has happened his brother, sisters , cousins etc all have been having babies and honestly I feel awkward cause it’s only us two who haven’t had a baby , his family asks me when are you ready ? And I say oh until I’m 18 and deep inside I know I’m ready and I’m trying but I get nothing but negs. Is it cause Maybe I’m over weight ? Or cause I’m trying to hard .... any tips would be fine .. if you have something bad to say don’t comment at all ...