Self-love is a state of appreciation for oneself that grows from actions that support our physical, psychological and spiritual growth. It is not an attitude of selfishness or superiority.
I have observed people; namely, women, make statements about loving themselves as a means to make themselves feel better about a situation that made them feel insignificant or invisible. As if loving yourself was an expression of becoming a better person by subjecting someone else or a situation with an attitude of malice. There is a difference between (a) loving yourself by individualizing your identity to appear superior and (b) loving yourself by becoming aware of your needs as a person and nurturing them. Loving yourself has no selfishness attached to it.
If you're in a bad situation where you don't feel validated and are ruminating in feelings of being unloved - loving yourself may just be a matter of being aware of the issue and taking steps to correct it. It doesn't mean becoming an instant narcissist and exaggeratedly advertising your newfound value for yourself just to get the attention you want, but don't actually need. If you love yourself, you respect yourself AND others around you. Loving yourself means accepting yourself as you are, being true to yourself, and displaying that confidence in a loving way. Otherwise, your love for yourself is shallow, desperate, and fleeting. Like a brick house built in the sand - not very solid.
Think about how much you love yourself by looking at your position within your social groups, how you communicate with others, and what you do in situations that don't feel favorable for you. Being loving to yourself will never be something that takes away from someone else unless those other people are the ones that are doing most of the taking - selfishly. Self-love is mostly about nurturing your needs before you try to take care of your wants with patience, understanding, and consistency. If you truly love yourself, others will know it in the presence you command - even if you never open your mouth.