21 and Pregnant.

So I'm currently 21 years old and almost 27 weeks pregnant. The closer it gets to my due date I've been getting really emotional. I was looking at my boyfriend the other day and this thought just hasn't been able to leave my head.. it's never going to be just me and him anymore we're gonna have a baby at all times and Im not ready to have that taken from me yet. Yes my child is a blessing and I also can't wait for her to be here but I'm also just going to miss what we have now. And I just feel like I'm so young and I won't get to be young anymore. And I feel like my body's gonna be ruined and it breaks my heart because I'm very self conscious. Anybody else experience this or have words of advice? 😔 I'll love my child so much, I already want to give her the world, but I'm just having a hard time wrapping my head around it all.