Self Love requires you to provide for yourself, taking care of your needs first. Being selfish is like being a hoarder, you only “feel” you have to get the most out of situations for the betterment of yourself not taking into account what the other person is giving. Verses self love which is providing your needs, wants, and desires in order to pull in a vibrational match.
Perfect example, if I go to the store and purchase me a water, and I have a partner or friend with me I would purchase both of us some water. Selfishness will have you buying you a water and saying my partner or friend can fin for themselves.
Be very careful of the energy you put out, and remember what you put out is what you will receive.
But self love, and loving another person go hand in hand,
if you don’t love yourself how can you expect someone else to love you.