Unloveable

I totally understand what you are feeling, and it can begin to feel like that something is wrong with you. I will say this, there is nothing wrong with you. Unless you are the most evil being on all of the planet, which I doubt you are, then nothing is wrong with you. I know it's cliche, but focus on you, focus on your goals and becoming a better version of yourself. Your goals should be YOU focused, and once you start to become focused on your goals, dreams, becoming your ideal you, etc. your ideal person will fall into your lap. 

It takes time to find your right fit, some people find it at 16 and some find it at 43. I've met both types of people and both are very happy. The one thing they had in common is that they focused on being their best selves, had dreams that they where working towards, and focused on those goals and dreams. If you begin to focus on yourself, people take a notice to that and are attracted to it. 

Never, EVER, change yourself just so someone will fall in love with you. That is not the way to go. It is a dangerous path where you will end up losing yourself. It is not a pretty path to go down and nobody deserves to go down that path. Be authentically you and your person will be attracted to that. Just have patience and give it time. 

I'm sending you all my positive vibes and well wishes!

Listen, I felt the same way.  So, when I was thirty, I asked "humans are social beings, but what if the negatives outweigh the positives?"

And I realized something: if I get into a relationship, I will no longer be who and what I am.

I also realized that I could never be a husband, a son, and a (potential) father all at once.

I am satisfied being by myself.  I have my piano and my writing and show an emotional attachment to both.  Find an activity you can do to keep yourself busy.

Relationships are a form of prison, especially for many introverts.  Don't get me started about "family vacations."

Read up on "self-actualisation," apply it to yourself, and enjoy your life.

You can also get a pet.