You should work on gaining more self confidence so that you'll be more comfortable around couples.

你必须增强自信，这样你在情侣身边才会更加从容不迫。

youdao

Going back to college has increased my confidence and I feel much more self-aware.

重回大学增强了我的自信，使我更加了解自己。

《柯林斯英汉双解大词典》

I am the kind of person who is sentimental and somewhat of a perfectionist, even in small things. But I know that I do need more self-confidence to see something through to the finish.

我是个感情丰富的人，而且有点完美主义，即使是小事也不放过，但是我知道我的确需要更多自信心来完成一些事情。

youdao

"Absolutely Sheryl Sandberg is right to encourage women to have more self-confidence, " she said.

CNN: Facebook's Sheryl Sandberg suddenly in crossfire

This comment is proved by the number of women who attend literacy circles: women learners show more self- confidence while practising uses of PRA tools and participating in group discussions.

UNESCO: Literacy and Community Development Programme (LCDP)

In addition, they also demonstrate significantly higher levels of positive social and personality development (e.g. positive interpersonal relations, good communication and creative skills, more self-confidence and a greater ability to integrate into the school environment).

UNESCO: Family Literacy Programmes (FLPs)