What are some examples of love in A Midsummer Night's Dream?

He doesn't. Shakespeare did not portray "his feelings" about love or much else in his plays. When Puck says, "What fools these mortals be!" that is what Puck thinks, not Shakespeare. When Lysander says, "The course of true love never did run smooth" that is what Lysander thinks, and he is saying it to cheer up Hermia who he loves. It has nothing to do with Shakespeare's feelings.

Helena says, "Use me but as your spaniel, spurn me, strike me, neglect me, lose me; only give me leave, unworthy as I am, to follow you." Helena has extremely low self-esteem ("unworthy as I am") which causes her to invite Demetrius to abuse her. Does this say anything about Shakespeare's feelings about love? Of course not! It is about Helena's character; you could not imagine Hermia saying this line, or Oberon.