I can feel for you mika_r san. . . and hope you will feel love relatively soon. At the same time, however, I would strongly urge you to try to NOT let it cause worry or concern.
Falling in love is primarily a chemical reaction in the body, mostly the brain, which is there for procreation. It is not a state that lasts forever, at all. In fact, it may actually last up to some 3 years at the most--on the overall average at the highest end. (meaning there may be that occasional, very rare case where it lasts longer)
The 'kick-in,' or degree of effectiveness of the hormonal mixes on the brain will be different for different brains at different times. That will be felt as a 'degree' of 'being in love.' For yourself, it could be a matter of low 'kick-in' up to this point in your life. It could also be a matter of sexual orientation.
Sexual orientation comes in three basic catagories: hetro, homo, and a. Then, there are possible combinations of these. The last catagory is where there is no essential attraction for the opposite or same sex; that is when a person's eros is said to be a low function.
How do you feel about your pull towards the opposite sex? Based on general observations, if you have a strong eros, you will fall in love easily--being 'pulled' (actually your own brain is pushing, though) towards the male function. If you have a weak eros, you will not.
BUT...please do not worry about missing out on your youth !! There are so many other things to do and especially learn !!! Being in the state of 'having fell in love' is very envigorating, emotionally stimulating, and gives a person a 'high,' but is not the only thing in life...especially at your age.
Anybody can kiss, perhaps, but that doesn't mean that much. The act of sexual touching can be done without being in love, and that's just that...no biggy. Think now, more so of your future, possible 'love.' Think of that time when your being 'in love' can be more fully expressed by the sexual act and that results in having a family①. Prepare for that now, by especially education !! Learn as much as you can. Experience as many different kinds of things as you can, and BE POSITIVE and PRODUCTIVE in becoming a full-rounded, and wonderful woman to fall in love with !!!

① This is not to say that sex before legal marriage is wrong or no good, but simply to say the likely the more fully involved and rewarding sexual intercourse is that with the willful and conscious effort of making a child...that's all.