How can I find myself after I made my boyfriend my life?

my boyfriend and i have been together for 8 years. i used to have my own life in the beginning of our relationship, i used to hangout with my friends, go out to dinner and happy in general. 8 years everything has changed. i have made him my whole life. i don’t do anything anymore. all i do is go to work, and the gym and wait for him to call to see if we are going to hangout. it’s absolutely awful. it honestly makes me sad, i put all the blame on myself. now all we do is bump heads. we are both so tired of the way our relationship is. all we do argue, i’m so insecure within myself that things between us are not the same anymore and our sex life is boring. again it is my fault because i don’t make things sexy in the bedroom. he is my first sex experience so i’m not an expert on what to do lol! what i do know if being nice outside the bedroom will makes things inside the bedroom a lot more fun. we don’t want to breakup, but we both are exhausted of negativity and insecurities. anyway, how can i get my life back after making my boyfriend my whole world?
How can I find myself after I made my boyfriend my life?
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