She puts his happiness foremost
A highly in love woman enjoys finding her boyfriend pleased. She then searches for everything little to make him happy, like planning her favorite meals and casually bringing him small gifts. These are small actions that portray she understands his needs and dedication towards the relationship.
At the same time, she understands her balance so that both have to meet their needs; therefore, she puts much effort to make him happy so that a positive atmosphere in their relationship is enhanced since mutual happiness leads to a stronger bond.