Hi TS,
I had this problem too, although my mum did not outright say i
cannot do this or that, but when i stayed over at my ex's place,
she'll use the guilt factor on me...
so listen to rainee and Yun, formally introduce ur bf to ur parents
and let them see what a responsible and decent (I hope) guy he
is,
and if even after getting to know ur bf on a deeper level doesn't
help, do what I did.
Sit down with your mum one day and have a talk with her... let her
know...
1) u know she does this out of concern and love,
2) that you are already 24, a responsible and working adult,
3) u have been dating him for more than 4 years,
4) that he is a trustworthy guy,
5) if she is afraid of u two "getting too close" let her know that
just by not staying over, or spending the night together does not
mean u two do not have the opportunity to "do it", that she has to
Trust you,
This worked with me, as in she still doesn't like it when i used to
stay over at my ex's place, but she'll only grumble but not
excessively...
take note, this only might work if u have shown your mum in this
past few years that you can make responsible decisions and that you
have grown up.