Have a life of your own and a garden of friends, "not just best friends." Remember that in life and love many people come and go through one's one life.
Learn something then. Learn what makes the world tick and how people interact to get what they want. Decide what you want. Then go for it. Friends and families and love are an intergral part of life's pleasures and pains, being able to take the frustration, sense of loss and love of another and put this into constructive learning on your part will go a long way into making life a learning experience with the byproduct being personal happiness and fullfilment. If you let stuff like that turn to negative energy you are robbing yourself of the real best friend you have and will always have....yourself.

tell them you totally understand that they are in love but not to forget their friends and tell them you will be there for them if they need you.And never lose your independance ever

first of all I would have a heart to heart talk with my best friend which I did when she got married. I happen to have lots of close friends but there is nothing like a best friend.

My best friend was very response to my feelings and took them into account. She told me that I wasn't loosing her friendship but gaining a family which included her husband. She included me more into her life like inviting me over for dinner with her husband and craving out 'us' time.

As time went on my best friend became more available to me and now we are as close as ever if not closer.

Just make more friends, it may seem hard now...believe me I went through the same thing... but eventually you will have a lot of friends. And to make things even better, your friend will probably start to miss you and will want to make things up to you.

Tell your best friend how you feel, of course!

Tell them that it upsets you that they don't make time to spend with you anymore. Tell them that you fully understand that they have someone else in their life, too, but that you also want to remain in their life and that you have been feeling neglected and ignored.

Chances are, they're just in love and too busy to realize that they're ignoring your valuable friendship and not doing it intentionally because usually this is the case almost 100% of the time.

People tend to be selfish, at times, I know, shocking, but true!

The best solution is for your best friend to set aside some time for you and your best friend to hang out. Just because your best friend is in love doesn't mean they should abandon ship and forget about everyone else in their lives; although, this tends to happen, at first.

Bottom line: Tell your best friend how you feel and if they truly are your best friend, then they'll make it a point to hang out with you more often & realize that they have been ignoring and neglecting you.

Good luck!