There are so many things that can make a person lovable. Personally, a person can be lovely when she also can show love to other people and even towards pets. I have always hated how some people will mistreat pets just because they can. I want someone who will also love cats as much as I do and will also be responsible and caring towards the environment.
The way that she treats her family can also make her lovable depending on the treatments that she gives. If she can show that she respects her parents and her siblings, this will make her more adorable. Someone who has a lot of love to give and also loves herself will always be lovable.
There are so many things that can make a person lovable but I think that what makes a person more lovable is when you can see how much the person can sacrifice for the people that he/she loves. Doing any type of sacrifice is never easy but if a person can do this for other people, this speaks volumes about how kind a person is.
When a person is selfless, this is definitely lovable. I also think that someone who is humble is lovable. This may be a person who has already achieved so much but he allows his successes to make the noise. He does not boast but he allows his accomplishments to show just how far he has come.