Is he only interested because another man is interested?

Anonymous
So I’ve liked my guy friend, G, for a while and I know he likes me. I just got out of a long term relationship a few months ago and had sex with G a week and a half ago. That same night, before I hooked up with G, he introduced me to his friend, H, and we hit it off. H asked G if he could pursue me because, honestly a lot of positive reasons. G said go for it and hyped me up, (he explained to me that since he didn’t know what we were he wasn’t going to aggressively claim me as his and his alone when I’m single).

Went on a date with H Friday and told my friends, including G, about how awesome it was. Ended up having an amazing date with G Sunday and spent the night, hooked up. He was different in the morning, like lovey dovey and he seriously looked like he had heart eyes. G has now been messaging me far more than he usually does.

Is he only into me because his friend is? If I pick G over H, will he be less interested because there’s no challenger? Or do you think he actually realized that he does like me and would pursue me regardless? Send help, this love triangle is confusing.
Is he only interested because another man is interested?
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