I'm willing to have a long conversation with you about this over the next several days or weeks, but have to sign off in a few minutes.
So, for a start, I suggest that you Google "NLP" or "Neurolinguistic Programming" and read as much as interests you. That system offers thinking tools for resolving exactly what you are dealing with. After you get an idea about the big picture, look for the procedure called "Reframing." Also known as "9-step Reframing." If you don't find it, just read the general info and we'll talk about it.
But know that reframing is
one tool that you can use to grow yourself beyond your insecurity. It will take work over time on your part, and that should be OK. The change might seem like magic when it occurs, but it will just be from solid work within yourself.
Questions:
What is your age?
What do you do?
Do you like to read books? If so, what kind? If you like to read, I'll recommend some books and articles. Two short articles on self management that you might find useful right now are:
senseofbalance2002
tccdriving
Last questions for now: (Put some energy into this)
Was there ever a time in which you felt secure in a relationship with a girl? What was that like?
If there never was such a time, imagine what it would be like to have a totally secure, trustworthy, uncontrolled relationship with a girl that sustained and improved over time. Take ten minutes to imagine this.
tao
There is nothing about a caterpillar that tells you it's going to be a butterfly.
-Buckminster Fuller