Still a better love story than twilight

Mari,Mariana,and Caylie,a trio of friends since elementary school have just entered adulthood,but life is only getting better! This trio is soon to discover love,maybe even true love. But will this friendship survive the pressure of life,love,and a yandere Ex?

*** some characters may be based from the manga "Hetalia" which I do not own,nor claim to own!!***