sentence2: Perhaps they are thinking that their problems in their own lives are enough and that they don't need to make new friends and acquaintances who would add to their woes.
sentence1: ربّما كان كلّ واحد يشعر أن هموم الحياة وحدها تكفي وأن لا حاجة لاتخاذ أصدقاء أو معارف جدد قد يشكّلون في النهاية عبئا إضافيا.