I feel like I'm going to be alone forever. Any tips on motivation or things I should try to maybe find the one?

I've had 3 relationship. First one was trying to use me to get pregnant, second was using me to cover up that she was lesbian, and third was too young and immature for me. Between, before, and after those relationships, I have been led on by girls several times (I like you, couple days later being like, nah find someone else), Rejected cause I'm just not for them, told they were lesbian, and/or told they are already with someone. Does anyone have any suggestions to how I might feel better about myself or on how to find the one? Thanks in advance.