Yes, I do think that your pattern of not examining the past IS affecting your future, but the real question is what are you most afraid of finding if you do look back and if you do feel? Are you afraid of failure? What is your biggest fear if you did openly express yourself to your parents? If you don’t have healthy ways to process emotions that come up in life they will likely build up over time and manifest in self-destructive ways. My guess is that this pattern is a large part of why you are feeling so paralyzed in your life.
Look for healthier ways to deal with your emotions. Consider journaling your feelings, joining a men’s therapy group, or talk with an individual therapist to help you get to the emotional root of why you’re feeling reluctant to start your adult life. Cultivate encouraging and supportive male friendships. Exercise to relieve stress, improve mood, and feel a sense of accomplishment and power. You mentioned that you don’t have the sense of independence that you want but you’ve “learned to deal with it.” Your sense of independence is paramount at this stage of life so I encourage you to foster that desire, not to relinquish it. It is important to take action, even if it’s clumsy and things don’t turn out perfectly. Ask out the woman that you’re interested in, send out 5 job applications every day, speak openly with your parents about your feelings, start paying them rent or pay them by contributing to the care of the home and yard. If usually feels better to act, even when you don’t feel like it, than to feel powerless in your own life.
I have a few questions about your parents. Why are your parents letting a capable 25-year-old adult son with a college education live in their home rent-free? Is it possible that they are enabling you to stay “stuck” at home because they are afraid of you leaving? Are you a buffer or a distraction that keeps them from dealing with marital problems? There may be some family issues contributing to your current dynamic. Again, consider seeking help from a therapist to help you understand and resolve your internal struggle and understand any family dynamics that may be adding to your difficulty “growing up.”
Take good care of yourself!