Feeling envious of my boyfriend …

We’ve been dating for almost 3 years I’m 25 he is 27… and we were both broke students back then. Then he started his job and became a little more active and successful, plays sports during the week and seems to be happy with this lifestyle. Me on the other hand , still stuck on my masters thesis , broke, no job in my field (molecular biology) yet. He is also very social , still has friends from high school , they always have plans , so I consider my boyfriend a very happy and positive person. I had no adolescence. My mom was very controlling, always said no to going out and I also feel like I was still a little girl back in highschool, like I still wasn’t mature enough to go out and try a cigarette or drink alcohol even if I wanted to. so now at 25, I feel like I didn’t have fun comparing to my bf. So I feel envious of him, not in a bad way. But I get sad , because I know that when we aren’t together he still has some fun alone, his life is full and i have no extra activity, nothing to feel fulfilled , so I feel incomplete. People go to the gym, play sports, have dinners with friends .. I don’t, I get a day or 2 where I have a little tea time with a friend but that’s it. I don’t have a group of friends to plan a trip or anything. So he doesn’t mind spending some days without me because he feels fulfilled alone, he has his plans set. Even though I like being alone and I value my alone time , I still feel I should be focusing more on myself and be confident so I don’t feel this way every time … I don’t want him to notice this