Do you think if someone loves someone else...really need some help?

Okay. So I think using fictional names will help to illustrate what I'm trying to say...Say there is a girl named Jenn and she loves someone named Penny, but she (Jenn) is in a relationship with Jack. Do you think that when Jenn is with Jack she is able to be satisfied with the emotional attention she gets from him - hugs, love etc - or do you think she will always miss and long for Penny? Do you think that since Penny is alone she probably misses Jenn more than Jenn misses her simply because she has no one to hold and kiss when she feels sad and stuff? lol Hope this isn't too complicated. Thanks in advance?