How can I get better at loving myself?

I believe that I have relatively high self esteem. I'm good at a lot of things. I am very creative so I'm happiest when I'm writing, dancing, singing, etc so I do a lot of that kind of stuff. I'm at the point where I have quit my job to pursue my creative passions so I feel much happier not having to work a job I hate. I work out 4-5 times a week. I definitely have a life outside of trying to manifest my ex. I hang out with my friends all the time. I laugh every day, I do the things I enjoy more than anything else. The only time I really think of him is when it's time to visualize or do affirmations and when he messages me (which he did again today yay!). But if you read my previous post, I do feel that I need to work on myself some more and really be happy with being alone. Sometimes I still feel empty inside without him and it sucks. Sometimes without all the noise and distractions of a busy life, I miss him. And I feel so afraid of rejection and what my life will be like without him. 

I want to be 100% truly happy without him. How can I improve my confidence, my self esteem and my happiness so that I can be truly independent and free?