Bonding the Love Interests

Well, I have given it a lot of thought and I think I know how I need to bond the love interests in my current novel together. They already share a love of the outdoors, sports, athletics ... so they have things in common, but the main character Samantha is filled with fear about death and close relationships with people. She has a problem letting go, she is reserved and likes to stay in her protected bubble she has created around herself. So I think the best way (an idea I derived while talking about the book with a friend, inspired by sharing of ideas) is for the two main characters to share adventure together. Something that both bonds them and frees her from her self imposed cage. So I am off to write about adventure, love, fun and relationships :0) As always Thank You for taking the time to read this :0)