Humans are by nature social animals, they need company without it pain is felt, loneliness.
I have been very lonely, particularly when I was younger. My parents had no interest in me, I was never cuddled, spoken too, kissed, no love, no comfort. Oh. How I use to long for a hug, a warm caring hug, I ached for one. Never got one.
Didn't have many friends (well none most of the time) I got bullied pretty bad.
I was very shy/socialphobia.
Its normal to want attention, its about being 'seen' being valued, feeling part of everything.
People can be thoughtless and selfish A thick skin is essential so any perceived rejections bounce off.
I think you should work on your self esteem which sounds low, you must think yourself as special, you are special we all are x

I feel much better now, I have worked hard on positive thinking and raising my selfish esteem. It works. Eventually.