Matthew Mason, 19, bludgeoned 15-year-old Alex Rodda to death with a wrench
Murder trial heard Mason had lured victim to woodland with the promise of sex
Alex had 'threatened' to reveal relationship after finding Mason was dating a girl
Mason 'didn't believe his friends would accept him if he was gay or bisexual'
Mason has been jailed for life with minimum of 28 years at Chester Crown Court