Effects of computer games on us

When I'm very tired or very sad. I want to relax myself. So I play the computer games. I'll feel better after I playing the computer games. We can see something from that . It's that the computer games can relax us. Sometimes it also can develop our brain and so on.
It has some advantages when we play computer games. But if you addicted in it. It'll have big influnces on us. Many people especially the children drop off their work and study to play computer games. They will spend their most time and money on playing computer games. Through this they will lost many things, for example doing exercises , communication with others, studying their course and so on. If this situation goes on they will lost more.
I think computer games can relax us and give us happyness .But they also can take many disadvantages to us if we addticted to them. So I think we can play them sometimes, especially when we are sad or want to relax us , but we can't be addicted to them. Or we'll lost a lot of things which are more important to us.