How can I embrace being single?

I(27M) have been single my entire life and I had become very lonely however I am on my self improvement journey. I have therapy and my therapist said to do the things I love and gives internal happiness and not care what's others think.

With her help, I am aiming to finish my masters and am now doing solo travel trips and pursuing new hobbies such as hiking and reading.

Sometimes I do feel down and try to uplift myself. However it can't be enough what I can do to embrace being single?