It has been questioned whether Othello deserves the title of a tragic character as he is not recognised as of noble birth by the society in which he exists. Othello is a well-respected and successful military figure in Venice, but he is not a member of the royal family.
Herein may lie some of the jealousy; from Othello to the position of those around him, who were born into their ranks rather than making themselves 'noble' as he has. This contrasts with the jealousy of 'Iago', tortured in the belief that Othello has denied him his rightful promotion to lieutenant, and may have slept with his wife, Emilia. Othello’s jealousy towards Cassio and the believed affair with Desdemona may be rooted in Othello’s insecurity in a society where he is still regarded as an outsider by some.
Love comes in such a wide range of forms in Shakespeare’s plays – courtly, familial, sexual, platonic, filial, to name but a few. You would need to identify the characters you wish this theme to apply to in order to develop a refined answer.