I also believe that its better to stay "single" (or at LEAST not living with your partner) for as long as possible (i even dare to say until you are about 25), this gives you the chance to figure out who you are, what you want, HOW you want it.... all in all you determine your own ways.... and you settle in them. After that, you are emotionally independed enough to cope with the adjustments of a permanent relationship, without it changing you too much. This way you will STAY happy in your ways, and not one day wake up and realise that you just dont like what you are anymore.