Love is a noble feeling; it is supposed to be void of all forms of negative feelings such as: hatred, jealousy, vengeance … if you love, your love must be unconditioned. Some people say “I love him/her, if he/she loves me back”. I won’t call this love because it is conditioned (“if”).
Love is a natural feeling which comes spontaneously and without our permission. So, for me, REAL love does not necessarily entail being loved back. If you really love him/her, all you will wish after is seeing him/her happy even from a distance. However, I strongly believe that if your love is strong and pure, one day the loved person will feel the degree of your love to him and will come to you eventually. All that is required is pure love and patience