As straight male cabin crew I am in the minority,however airlines are no different to any other company in that your gonna get people that cheat and people that dont. I have been going out with my girlfriend (also crew) for nearly a year and its not easy,but if you trust each other 100% it can be done!
Good luck.
p.s you would be surprised what married pilots tell male crew like me what they have been up to down route,think they think its male bonding!!