<human>: Give me the gist of the text in a nutshell

I (20F) have been in a relationship with my BF (21M) for over two years. We've know each other for over three and have been living with each other since September 2014. 

In the last eight months my BF and I have been living together. We have gotten to know each other and appreciate each other on a very personal level, even more than before we moved in together. Even though I truly do love him, I feel as though I could be missing out on something/someone better. I don't feel motivated when I'm around him to become a better person even though he says "I'm perfect just the way I am" but it's hard to believe when I don't believe it myself. 

I've been depressed recently and I've been trying to make changes in my life that I think are better for me. I've been making new friends especially of the opposite gender and it makes it hard to know if I'm really missing out on something/someone that I could be meant for (better than with my current situation). If that makes sense... 

I don't want to break up but I guess I want to live on my own again so I can think about everything that is going on in my life and make new priorities that are better for me. I truly do love him but I feel that I need to change some things in my life that I think will make me feel happy again.
<bot>: How do I approach the subject/ what should I say that I want to move out and get some space without breaking up or him getting the wrong idea?