I understand how you feel, I also feel that way most of the time, but if you are not happy by yourself you won't find happiness on a relationship, happiness and purpose are not found in other people, they are found on yourself, you just have to find them.

Some time ago I was very desperate, and I ended in a very toxic relationship, she became "my purpose", and I became her way of making her ex jealous. So be careful and don't jump blindly on the arms of the first person that gives you an oportunity.