I have a little flip chart of quotes from St. Thérèse. It has been open to the quote below for weeks (and I’m still not ready to flip it). I hope your reading it will increase your confidence in the greatness of God’s personal love for you.
Just as the sun shines simultaneously on the tall cedars and on each little flower as though it were alone on the earth, so our Lord is occupied with each soul as though there were no others like it.
“With each soul . . .” That means you.
There is a website, http://www.littleflower.org, that has a quote from her every day. You might enjoy them.