Nope, He actually didn't lie about the "unrequited love" but neither with the producer thing.
Glen was talking about his passion for movies, that's his unrequitted love. His manuscript was rejected once again, so He feels like the movie industry that He loves so much don't have a field for him. Or more like He doesn't have what it's needed to make it.
I wanted to clarify this point because I think was really subtle and a lot of people didn't get it, but talks us A LOT about Glen.
Moving to the Ryan thing: It's actually Ryan who seems to have something with Glen, wich is clearly rejected. Glen also said that He didn't love anyone before, and just had a lot of sex experience.
So the tension is definitely coming. I have a feeling that McQueen was going to meet up with Ryan (the unrequited love) that night he said he was supposed to meet the producer. I’m not doubting his love for Ed, but I do think that he did and might still have some feelings for Ryan which is why he probably doesn’t want him doing porn and also was quick to try and put Ed at ease in the car when Ed didn’t even ask him anything.