Six correct ongoing sentences in the past using imperfect tense !

Mientras yo vivía en Puerto Rico, yo era feliz.

Translation: While I was living in Puerto Rico, I was happy.

Yo habitualmente salía con mis amigos y bailábamos toda la noche.

Translation: I usually went out with my friends and we were dancing all night.

Después, cuando estudiaba en la Universidad de Texas, ya no tenía tiempo libre.

Translation: Later, when I was studying at the University of Texas, I no longer had free time.

Pero después de los exámenes, todos los estudiantes hacíamos una fiesta de fin de curso.

Translation: But after the exams, all the students were having an end-of-year party.

En esas fiestas nos presentaban a chicas guapas.

Translation: At those parties we were introduced to beautiful girls.

Yo me enamoraba con facilidad pero quería casarme después de mis estudios.

Translation: I fell in love easily but I wanted to get married after my studies.