Why Are Friendships And Relationships Hard To Maintain?

Because they may not be the one for you.

Next time you three are together I would just talk to them about how you feel.  Also how long have they been together, if they just starting dating maybe that relationship is still new to them both.  If you can't get them together maybe just her your friend and tell her how you feel, please be very gentle on how you say this to her.  Friendship and relationships are very hard to maintain.  each person have to be prepare to give themselves to the other person in order to maintain a healthy mutual relationship.  If one person fails to respond or put a strain on this relationship the other person will feel affected and start acting a certain way.  That is why communication and listening is very important in any relationships that you form.  If you don't do both or just one of these things then you don't or will not have any real relationships with anybody but yourself.

Just talk to them it doesn't have to be in a rude way but you don't want to hurt them either because it could still mess up your friendship, let them know that you are feeling like a third-wheel or however it is you feel. Telling them the truth with better your friendship.

They are hard to maintain, because 1. You are dealing with people 2. It takes work and lots of communication to keep relationships working. 3. Sounds like you have some socially retarded people you are trying to be social with. I have had the same thing. Some women just can't have a lover, and a friend. Their loss. Look for opportunities to socialize with people of your obvious social maturity, and class. Don't waste time trying to get a word in with silly lovesick lovers. Join a book club, or the Y. Or something that would attract the kind of people you prefer to befriend. Blessings to you, and may you find some special people who appreciate having a friend of your caliber.