First of all, Welcome to the board.
There's a lot of good advice here.
I've always felt that fear can be great for motivation. When I first started riding (on a 125cc chinese clone) with my husband (who has been riding for 20+ years) I was fine at first. We mostly stayed on small single lane streets.
One day he decided to take me out on a 3 lane street (50mph) on the way to one of the local cycle shops. He merged left to turn onto another road and I went to follow, just as I was nearly in the other lane I looked over my shoulder and saw a car right where I wanted to go, and 100 ft in front of me was a gaurd rail. I had my blinker on, but the lady talking on her cellphone in that car was oblivious to my attempt to merge. After wobbling a bit and fearing I would crash I finally made it into the merge lane, but I lost my husband! Since I only had a permit to ride I wasn't sure what to do next, so I just proceeded to the cycle shop. I found my husband across the street drinking a slurpee and laughing. He saw everything and asked "Do you still want to ride a scooter darlin?"
That whole adventure scared the carp out of me! It took 3 whole days for me to get the nerve to ride again. The lesson I learned- ALWAYS LOOK OVER YOUR SHOULDER BEFORE YOU MERGE- don't rely on mirrors. Take a riding safety course, and take every near miss as a lesson in what to avoid.
Just as you think you're over your fear something else will happen and scare you again.
Once I got the M endorsement on my license I upgrade to a BV250, at least now I can gun it and get away from scary drivers like the one in the above story. On the ride home from the dealer I figured I was safe.... until I went to make a very slow right turn uphill and discovered the BV250 is MUCH heavier than the 125cc I was riding. I almost dropped the bike- with a line of cars waiting behind me- and caught it before it hit pavement. It took a few mins for me to get it upright.
I'm much more comfortable with the larger bike 3 years later. I still ride with the fear that some moron will turn out right in front of me. I had a near miss 2 weeks ago on the freeway. I haven't been on the freeway since.... maybe I'll try again tomorrow
Riding gear is a MUST- Full face helmet, riding jacket with armor, protective pants, over the ankle boots, and riding gloves.
Ride safe and have fun!