I need help on my rabbit?

Okay Basically i had two rabbits, but last night they somehow managed to dig a hole and escape.. i found one and she is safe <33 and i've given her lots of attention.. but i found the other one dead killed by a fox on the pavement. :''( they have never been apart they were sisters and i have had them for about 1 year. Is there anything i could do my rabbit so she wont get lonely.. because i am at school, then i have homework so i only get about 2 hours to have a mive cuddle and a play with her then i put her in her hutch for nighttime. but i don't want her to be lonely so what should i do?? x