I'm happy （我很高兴） 还有其他的表达方法可以用：
In good mood 心情好
例句：
（1）Sometimes I feel very tired than before, and I can keep in good mood.
有时候我会感觉比以前更累，但是我能保持心情愉快。
（2）Everything works better being in good mood.心情好，一切都好。
（3）I am in good mood today.今天我的心情不错。
2. Excited 兴奋
例句：
（1）I'm very excited about the possibility of playing for England's first team
想到可能为英格兰首屈一指的球队效力，我非常兴奋。
（2）I was excited about the possibility of playing football again.
想到有可能再次踢足球，我很兴奋。
3. Buzzing 激动的，兴奋的
例句：I'm buzzing for the holidays. 一想到度假我就好兴奋啊。
4. In high spirits 高兴
例句 They are in high spirits when they think of future. 他俩一想到未来就很高兴。
