Self-esteem

Do any of you ladies currently have low self-esteem or have had it in the past? How have you coped and built your confidence? Here’s a little backstory. My boyfriend is a very popular/well-known guy in our town. Meanwhile, I’m the complete opposite. I have very little friends and often struggle to make new friends (I feel really awkward in social situations if I don’t know people). I’ve been hiding this from my boyfriend because I’m so embarrassed and feel silly about it. But, sometimes I don’t feel like I’m good enough. I just feel awful like compared to other women my age I don’t have that pizzaz, sex appeal, or I just don’t exude confidence. I feel so lonely and just yearn to feel accepted/wanted (basically having a group of supportive friends/people I can be myself around. I’m just trying to gain confidence so that I can feel better and get out of this depressive mood. Any tips? I’ve struggle with this since I was a little girl (now in my mid 20’s). I’m embarrassed because he won’t understand it because he’s never been the odd one out.