Because you struggled to let go of grudges.
By all means, you should expect the best from whoever you date – you deserve to be treated with love, respect, loyalty, and tenderness. But you have a hard time letting go of your significant others’ (or potential significant others’) past screwups. And we’re not talking major things like cheating. Rather, even after your partner apologizes for something like being short with you last night, or not attending your friend’s birthday party with you, you hold it over them for a long time. You tend to bring it up in other fights, even when it’s unrelated, and you continue to talk about it long after they’ve apologized and you’ve ‘forgiven’ them. You haven’t yet learned how much of a detrimental effect this tendency can have in your relationships, and until you do, it will continue to cause problems.
Because you jumped into things with people at full-speed, before you even decided how much you really liked them.
You have a natural thirst for adventure, and you are always drawn to things that are bright, exciting, and fast. This has lead to you living a very thrilling and active life, but you haven’t yet learned how to positively adjust this characteristic in your dating life. You fall hard and fast, and oftentimes, you’re so in love with the idea of being in love that you don’t even give yourself time to truly get to know someone (and really understand whether or not they’re the person you want or the right person for you). You didn’t fall in love in 2017 because you weren’t focusing on finding the right person – you were just zeroing in on whoever was most exciting to you in the moment.