My Girlfriend says she doesn't know if im the one...What does that mean...?

it means she's not sure either way. give it sometime. u have no idea what could happen :P

Ok well your at least lucky enough to know that she considered the possibility. But it definitly means she has a considerate amount of doubts about you. Try to found out the things you do that she doesnt like or what she doesnt like about you without asking her and change them. I wouldnt recomend that you change yourself in anyway for someone who doesnt love you. and YES if she doesnt think you are "the one" then she does not love you. but you must consider the fact that love is an over-used word these days and love is more meaningful and powerful then alot of people think. But all hope is not lost. Unless she has found someone else to take your place i doubt she will break up with you. Girls are unpredictible in many cases however. but as long as yall have fun together then she still has a reason to stay with you. So as long as yall ate still together you still have a chance to convince her you truly are the one unless you dont want to be are dont plan on being the one. "the one" can refer to both marraige or first sex partner, first refered to both but nowdays usually just marriage.

hope this helps ;)

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I think it means she's doing what she ought to and thinking it out. Maybe she just isn't sure yet from where you both stand, and just needs more time spent together to see if you're really the one she can trust with anything and everything for the rest of her life. I'd think on it too, to ensure I've got the right guy who's going to give me the most enjoyable and happy life I could ever have with someone by my side.

Could mean she doesn't know if she wants to go to a whole new lvl with you if you two haven't gotten to 3rd base then that could be it. If you have maybe she means her soul mate, the one she can see herself married to and living with.

It means that although she likes you and may like being with you that you unfortunately aren't the one that will make her swoon, her heart beat a million times a minute or make her knees melt like butter at the very sight of you....it basically means she's not IN love with you although she may love you.

Either she's not ready to have sex with you or she's doesn't think you two can last in a long term relationship.

She doesn't know if you're the one she wants to spend the rest of her life with. It's pretty simple.

Your not the guy she wants to spend the rest of her life with!

the way i see it

either theres someone else...

or she just wants to be with you, but doesn't want anything too serious, like just have fun while it lasts but she doesn't want to marry you.

Means that she is not ready to take it to the other level (to have sex with you) and by the sound of things she is definitely doing something on the side with other people.