I'm jealous of my friend's relationships.
Why are you jealous of their relationships?
Because I've never had a real romantic relationship.
I know you wish you had a romantic partner but you shouldn't be so jealous of your friends' relationships. You should be happy for them and not envious of them. You will find a satisfying romantic relationship, just be patient.
I like my friends but I'm tired of waiting for a partner.
I understand that you feel impatient and want a partner. But, try not to be so jealous of your friends because they already have one.