Hello Friend, Good that you are seeking a help. I appreciate your interest to be independent. Yes it's important to have that freedom in your life. Life is not just this love and relationship, it's much more and you can't be having such an insecured and dependent feelings always . Set your priorities and goals. Automatically you will focus your time on productive work and career and not wait for his calls. Sametime, try to understand his point of position as well. He may need to spend time in  doing his work, earning, commitment etc. Hope you can explore your corrective actions. If you need any help, then take a counseling support near you or reach me online.

Your happiness should come from you, noone else We need to work on your thinking process. You will be fine with counselling and able to change this mindset and be more independent.