Sandra Bullock isn't ''missing anything'' by being single.

The 'Gravity' star hasn't been seen publicly with a new paramour since her split from ex-husband Jesse James in 2010 but insists she is content being a doting mother to her three-year-old son, Louis.

She said: ''If [a relationship] should come along, great. But I feel like I'm not missing anything yet. Maybe one day I will. But my son is three years old, which is an amazing age. Four is an even better age. So if something happens, great, but if not, I've got plenty to do.''

The 49-year-old actress' life has been full of joy since she adopted Louis in 2010, but she admits she has a rather bittersweet view of the world based on her past life experiences.

She told the new issue of Entertainment Weekly magazine: ''Life is a series of disastrous moments. In between those moments, that's when you savour, savour, savour.''

Earlier this month, single mother Sandra revealed she would be open to filling her home with more children, but only if her son gave her his stamp of approval.

She said: ''If all of a sudden my house had eight kids in it, if it was OK with Louis and it felt like a good safe family, I would be fine with that. It would be because that is what my home is for. So it is up to him. He is the boss of the house so I have to abide by his rules.''