Just a personal perception (I am no expert)
Sometimes we believe there is everything in the what we want when truthfully its the wanting it that makes it seem that way.
It is understandable to want to be with someone, have a family - Human nature is hardwired to procreate and be one part of a whole (male and female whole).... It is what life is for right.
You say you know you would make an excellent partner and mother but, then you wonder if you have what it takes - You are (like so many of us here) worrying almost as if you are worthy enough to have what you truly want?
You are more than worthy!
The maternal within you is a given so yes, you will indeed be a fantastic mother - The real issue here is `partner` - I sense a fearing of not finding Mr Right and ever finding that perfect future? (correct me if I am wrong though)
Thing is, meeting `the one` is only ever going to happen through trial and error - short term relationships are not failures as much as they are experience. It sounds so easy for me to say I know. Yet, to check my relationship history though it is not at all rosy, I have met a lot of unsavoury characters along the way
Empathy and discovery of yourself is hard work - embracing it is extremely tough especially when it comes to relationships with others because you now grasp that you are on a higher level of emotional vibration to the most - Mr Right is the one who will accept you for you but, disagreements, annoyances etc will all come with at some time or another - Choosing the right person for you (only you will know what is right for you) may come with keeping yourself open to someone who may not seem your `type` to begin with?
Wanting something so much can sometimes put barriers up to actually getting it, as if the want almost becomes too much of a focus and everything else about you diminishes - The being a fun loving person or being into a certain subject (things that would attract someone to you) gets lost in the focus of seeking. Take a step back and see what makes you happy in life (as yet you have no responsibilities to hold you back) enjoy what you can and the empathy will blossom with fantastic vibes - This may well attract many to you!
I hope I made sense?
You deserve all that you want and I wish you all the best