[BostonDoctorTTT]

When you feel alone, it is usually a trick of the nafs it starts to chatter 'I am all alone', 'I have nobody' etc. etc., you can either ignore this or make positive affirmations instead say to yourself and think...I am Witnessed by Allah swt, Allah is always with me, His nearness to me is closer than my own self, Allah swt Loves me, He has Mercy for me. etc. etc. Positive thoughts like these if brought to mind constantly will make the nafs tranquil. Long periods of aloneness can be used to strengthen oneself. Any passing thoughts about missing out on life can be 'accepted' without judgement (oh no this is bad I must not think like this etc.) and let go...do not try to fight the thoughts or repress them just let them pass through your mind and 'observe' them, notice that you are observing the thoughts passing through your mind and can either accept them as true or just let them pass as 'thoughts' that are short lived. No big deal you do not want to go back to your previous life anyway its attractions are illusory, they may give temporary pleasure but they eventually cause one to be harmed. It is like an itch the more you scratch the more you itch.

I hope that helps insha Allah.