When someone likes you, or loves you, but 'not enough'- that can break you. It makes us look within as we try and figure out why they didn't stay, or why they didn't choose us. Am I not smart enough, not pretty enough, not funny enough? It is all too easy to displace someone else's lack of commitment onto yourself- if they can't commit, it must be my fault, right?
No. It is not a reflection of you. Because you cannot love someone into staying. You cannot love someone into loving you.
And the truth is, relationships are less to do with you, as a person, but the both of you as compatibles (or incompatibles). Them not choosing you- it means you aren't compatible. It means they are not your person. They are not worthy of you soul, your being, your deepest thoughts and fears. You deserve someone who accepts and chooses you, without doubt, without hesitation. You will never be too much, or not enough, for the right person. You need someone who looks you in the eye and makes room for you.
The only love that will be there for you, through and through, is the kind of love that always comes back to you, that always stands by you. This love exists. I promise you that it does. Please do not sell yourself short.