My best friend's cousin

This a novel of a teenage girl who finds herself having a crush over her best friend's cousin, who didn't notice her over few years till she grew to be women with well built body. He started noticing her and their relationship was always a rollercoaster, always flirting but when they meet things get awkward, until the 18th year birthday of the best friend. Lola and Andrea ended up sleeping with each other, which was the beginning of their problems. Now they have to deal with a big problem that might bring a huge responsibility in their lives and with a lot to lose.