Aw Mickey you sound so sad right now.
It is important to have an awareness of what is often called catastrophic thinking. If a person believes that they will never have a relationship, they may withdraw into themselves and that very withdrawal makes it harder to have a relationship.
My advice is to treat these thoughts as like rain on a day that you are thinking of going to a museum. The thoughts/rain are there, but you can still move forward towards your goals/the museum. Acknowledge these thoughts without judging yourself for them, and continue to work on moving forward towards figuring out your goals and moving towards them.