<human>: Summarize the given text in a few sentences.

This girl and I have been together for 6 months and honestly she's freaking amazing and we have been discussing plans, marriage, house, etc in the future. I had planned on proposing this fall but honestly looking at some things has me concerned I'm in this for the wrong reasons.

I love her and her son so much and hate to think being without them. They both make me feel incredible and make me look forward to the future. However, lately I've found myself thinking of the negative stuff like having a kid costs money, I lose my ability to do anything spontaneous, what if I want to pick up and move across the country again? All these things make me think I should quit and that maybe I'm more in a state of mind where I just don't want to be alone and that's why I'm with this girl.

A lot of times just randomly I find myself thinking I should just break up with her for the reasons listed above and just stay single. I dont know why, I can be doing something totally and completely separate from her that a normal person wouldnt make the connection between and just start thinking I should end it. I hate thinking like that because really my heart starts to hurt when I think that way and begin to imagine being without them. My brain though, it's a douchebag and it doesnt give me a clear path to happiness, whether that be staying single or being with them. Am I just being irresponsible and afraid that I no longer have to worry about just myself if I continue to be with them? Should I just continue the way Im going and hope the thoughts stop? Im so confused and it really sucks.
<bot>: Have an amazing girlfriend who makes me happy and want to spend my life with her. My brain constantly makes me think about being single