how do invite some বন্ধু to a party with out hurting the other বন্ধু feelings.

আপনি COULD try to be a bit devious দ্বারা telling the বন্ধু that আপনি want to stay over your situation and not let the others know about this sleeping over business at all. অথবা আপনি could tell them all the situation you're in and hope that the ones that aren't sleeping over understand.

It is hard to tell to বন্ধু that আপনি picked other people over them, but unfortunately আপনি did not really have a choice. Maybe if আপনি told your mom আপনি do not want to hurt your other friends, she would let আপনি have an other sleep over in some time and আপনি could invite the other বন্ধু at that party? If not I would try to explain to them that আপনি really wanted them to come to, but your mom did not let আপনি invite any আরো people. আপনি could do something else with the বন্ধু that can't come, like treating them to a movie অথবা something like that, to make it clear that আপনি really like them too.
If the party where all your বন্ধু are coming is at the same night of the sleep over, spend some আরো time during the party with the বন্ধু that can not stay. আপনি will have plenty of time with the ones that are sleeping there.