Once you have fallen for someone, you never give up easily. It seems that jealousy towards your friends' presence continues to grow within you. However, that jealousy will gradually distort this emotion. Are your feelings for that person truly romantic? Or do you simply want to take what belongs to others? Please carefully discern this.
Even if you try dating him once, sooner or later your friends will find out. Even if you hide it perfectly, there's a chance that person will slip up. It's better to forget about that person sooner rather than later before you get caught. Please think about yourself and your friends.
In love, always staying positive and having courage, finding the next person is not so difficult for you. Rather than these restricted feelings, finding true feelings that don't hurt anyone is also for your own good. It's better to give up this feeling before it gets complicated.