Thanks so much for writing in for help. The fact that you are reaching out for advice in this forum means you have some hope that things could be different for you, that you can feel differently about yourself and your life.
What you’re describing sounds like depression: social isolation, insecurities, withdrawing from activities, negative thoughts, hopelessness. First, I want you to go to your physician and have a physical to rule out any physical illness. While you’re there please talk to your doctor about your hopelessness, isolation and fears. See if medication is an option for you. Your tendency to turn toward technology may be a way to numb your emotional pain.
Also, ask your doctor for a referral to a psychotherapist in your area to work on ways to improve your mood, gain self-confidence, and gain relationship skills. You may also want to consider asking your parents to attend family therapy to improve your family relationships. Even though you’re 19, it sounds as if you’re still stuck in experiencing the “childhood” disapproval of your father, and criticism of your mother, and letting those emotions dictate, on some level, how you feel about yourself. The good news is, you can feel differently.
Your family relationships greatly impact how you feel about other relationships. If you think about your relationship with your dad as the “template” for male relationships, and you experienced him as scary and critical, then it makes sense that you would be hesitant to open up to other male relationships, like friendships and dating relationships. It makes sense that you’d have only a few female friends, too, because you’ve experienced your mother as nagging and constantly correcting you. She is your model of how to relate to women so you likely may fear disapproval in your female friendships as well. Your therapist can help free you from these patterns so you can experience relationships with others differently, and not as extensions of your parental relationships.
In addition to meeting with your physician and therapist, I’d like to recommend a couple of books to you: “Feeling Good: The New Mood Therapy” by Dr. David Burns and “The Relationship Cure” by Dr. John Gottman. Both books will provide excellent tools and new perspectives on yourself and your relationships.
Thanks again for writing in. Take good care of yourself!