Vous vous amusez, second person plural, present tense indicative of s'amuser: to have fun;

Ensemble = together;

De temps en temps = from time to time;

Vous vous écrivez, second person plural, present tense indicative of s'écrire: to write each other;

Des messages électroniques = emails;

Tu te disputes, second person plural, present tense indicative of se disputer: to argue;

Tu te disputais, second person plural, imperfect tense indicative of se disputer = you used to argue;

Eux, a stress or tonic personnel pronoun, third person plural masculine = them.