It's the all-too-familiar gay story of falling into unrequited love with one's best friend.
It becomes especially obvious when that friend has chosen a sexual encounter with an older stranger than one's own company.
What I found most remarkable is the restraint shown by the main character. Frankly it sets a good example for young LGBT people, that sometimes it is better to maintain a valuable friendship than ruin it with an ill-fated attempt at sex.