Your worries, your feelings, your thoughts arise in your own mind. You are totally responsible for all your feelings - how you feel, what you think, what you do... You are responsible.
Meditation is the only way you can transcend the negative thoughts, and then positive thoughts will come spontaneously & automatically.
If you are bombarded by so many thoughts in solitude, you are in ignorance. If you are calm even amidst a crowd then you are in knowledge.
Wake up and realize this is all made up of thoughts, just thoughts. Your appreciation of beauty is a thought; your aversion to an object that is ugly is a thought. Your craving or aversion is nothing but a passing thought in the mind. Realize this is just a thought and you will be free.