Don't force yourself to put up a false front if that's not how you feel - tell the truth. You will be forced to keep to a pace set by those around you, but you will be fine. Feeling useful will energize you.
Your mood allows you to overcome your worries. It is this ability to stop and think that will help you find solutions.
Don't feel compelled to act so quickly; plan what you are going to do.
You will be able to use your convictions to convince your co-workers and your enthusiasm will infect the people around you.
You will feel very comfortable with your partner. It's time to enjoy the pleasures of the moment. Keep a healthy distance from your doubts.