hi there i receantly got my first girlfriend we have been going out just over a month

we are both really happy

and we really enjoy just going to eachothers houses or going anywere togeather.
my problem is my mum doesnt want me seeing her everyday (so far these school holidays every single day we havnt been busy or one of us away from our houses we have seen eachother) which is like 15 days out of 25 lol.
my mum said yesturday after i was like begging to go over her house that she would rather me sit on the computer all day talking to her on MSN (my mum allways used to yell at me for no lifing on the computer (i used to play runescape i quit awhile ago) and now she would rather me sit here on the computer all day than me seeing My girlfriend

its so annoying and weird.
well do you guys think its better for me to sit at home on a computer talking to her (or on the phone) or having her over at my house or me at hers or going out somewhere?
PS: im only 15 so i need lifts or being picked up everytime i go see her.