Well, first of all love should not be based on anything physical... you should love her for who she is...

Having said that, a big part of who a person is depends on health/hygeine/respect enough for your own body to keep healthy... If this is something that may be health-threatening or if its just a little extra chub that we all get at some point, I can't tell from the post... For me, overweigth people are not attractive not because of the sheer physical aspect, but the lack of self-respect and drive/discipline (of course, there are many illnesses out there that make this difficult to manage, and I am not vaguely stereotyping anyone here, just making a generalization.) However, if I were already in a relationship with someone (especially a longer one like a year) this would not be the case as I (assumedly) would have found enough about who she is to make me attracted to her, not just physically... In short, I'm saying that it sounds like your relationship is a bit shallow if it can completely turn around with 25 lbs... maybe it's YOU who needs to go to the "love gym" ( hehe) Physical attractiveness is mainly that; attraction. It draws you to certain people and away from others immediately; part of our human response. Then, we form a relationship with people and learn more about them and grow with them and learn to love them. Sounds like you are just there to get laid and now that shes not so hot anymore you want out. Which quite frankly disgusts me. Sex is an outward expression of an inner love and you clearly are not mature enough to be doing such acts as a silly thing like a few extra pounds after knowing this girl for over a year can force you to ask for help on an online message board... Please consider your motives and pick the log out of your eye before harping on the speck of dust in your girlfriend's...

Now, from another point of view... if this is a serious problem; i.e. obesity or real health risks, then you will be hurting her more by being nice and trying to protect her as she continues down this path than you would be if you just out and said it. What do you say? Well, assuming this is a loving relatoinship (which it does not sound like it is...) you would say something to the affect of: "Honey, listen. I don't know how to put this and I don't want to hurt you, but I need to be bluntly honest with you. I am really concerned about your weight and your health... I am afraid that I will lose you (eventually) to illness and that you will not be happy in life because of this. I am really worried about you, and want what is best for you. I have bought us both a month at the local gym; I will be going there these days at these times, and I would really like you to come with me." Something to that affect... or maybe no gym, just running/some other physical activity. Now, this is, again, based on the pretense that you are in a loving relationship and not just trying to get laid... which means I may have wasted my breath... Love would not sit idly by and watch someone you care about getting sick and unhealthy, nor would it hold the truth back in order to pacify things for the short term. So, what do you do? I say YOU should worry about YOU first; since it sounds like you are extremely shallow and only in this for some ass, noone deserves that, so please extricate yourself from any human contact until you can think with your head and heart instead of your little buddy down there. If I misread this and you ARE in love with this girl, then be honest with her and be THERE for her; making demands and quotas and using lots of "you" statements would be a bad idea... be there WITH her, not AT her; again, tell her you will be going out to do some activity; biking, running, whatever, and HELP her that way... sounds like you just want her to go and fix herself so you can stand to diddle her... anyways, please consider these things, and if all else fails, honest is always the best policy.