u really sure na nahan jud ang imo gf sa kato na guy? or maybe u feel lang dat she loves him when in truth that guy is nothing more to her than just a very close friend and na threatened lang ka sa ilang friendship? talk to your gf about it. if she really loves you, she'll put your feelings first before anyone else's. If she doesn't, then she's being selfish and basin nahan ka muthink kung nahan pa ba ka mpadayon if katunga ra ka para niya. Advice though: Don't settle for less, bai. There's no such thing as a "half" relationship. Either she loves you or she doesn't. It's all or nothing. Good luck!