I feel resentful towards my fiancé when it isn't his fault to begin with.

I'm 23 and have been a mother for just over a year. I love my son and his father. (We are engaged and planning our wedding later this year, so it isn't like a baby-daddy situation.) But over the past year, I've realized how much I felt dependent and trapped. I am a SAHM and don't leave the house very often unless for grocery shopping or doctor's appointments, whereas my fiancé gets to go to work and make plans with his family. I don't have a supportive family, unlike my fiancé. When it comes to my family, if it doesn't benefit them in some way, they don't want to be involved. So I feel even worse about myself when my fiancé's family comes to him with invitations to different things and mine doesn't. Not to mention that my fiancé has a plethora of friends who invite him to do countless things and the only two friends that I have don't even live an hour away. (One lives in a completely different state, whereas the other lives across my current state.) I know deep down that I'm jealous of the freedom my soon-to-be-husband has but I also know that this is my own doing. I'm envious of his ability to befriend anyone when I am too anxious to do so. But I still can't help but feel trapped in my constant routine of motherhood and being the wife he deserves. Now my fiancé has tried to help me make more friends but it's hard to keep them when you are always a mother first. I do love my little family so much. I guess I just wish to be able to be the 'me' I was a year ago.