That is something that you would have to discuss with them, as there could be a variety of reasons, so no one will be able to tell you for definite. Try and approach your parents in an adult way and explain that you would really like a sleepover and it is a common practice amongst yor friends, and something you feel you are missing out on, so could they explain their concerns about you having or attending one, so maybe you can try and work out a compromise? If you talk to them calmly and in a mature way then they will see you are sensible and hopefully you can work something out.
At the end of the day though, they are your parents and they get to make these decisions for now. It may feel unfair, but there are plenty of other things you can do with friends that are fun, and you can always have sleepvers at a later date.
Maybe they dont want for any accidents to happen, meaning they will be responsible if something bad happens to the other kids.. When i was younger i had the same problem, but now that i'm older i understand.. later when i have my kids, maybe i'l let them have one friend over, but not a whole group.. I dont think its because they are trying to be mean to you, they just want whats best for everyone on the safe side
My dad doesn't allow it because he doesn't trust other kids and he doesn't want his things to wind up missing. And he doesn't let me go to other people's houses because if something of theirs went missing, I would be a candidate for blame.
i want a female friend round to cheer her up because she has a rough time at home.
maybe cos they dont trust other parents to look after and take care of you
with girls or boys ?