Ok first off, there are various reasons to why a person would kill themself; you are troubling on what would your sympathetic stance be, as not to the actual fact, wich is the suicide.
What I think people should look is for the actual suicide fact, because any action that caused it is the action on wich your priciple would face a sympathetic value.

What could those facts be on a case like this; the three most common forces around the act of killing one self are: social stress, manic depression(caused by social stress normaly), and idealistic stance.

When someone has dificult social problems, they tend to draw themselfs away from society, and become very defensive and evasive towards any social behaviour. Normaly people on with this problem don't get around enough with themselfs to solve their state, wich only leads them into getting more shut and eventualy depressed. When people eventually hit the depresion, full on with social problems that keep growing due to the fact the person hasn't been able to help himself out, they normally blame themselfs for all this, and end in several suicide attempts, with little chance they would actually succeed, being scared still, but facing the idea of death each day making it more and more probable next time they will succed by not being scared anymore. So if any sympathy needs to be gone around a case like this, it should be on the fact that society hasn't bring it self upwards to help this tipe of people who give you lots of times for you to help.

In other cases when people are dealing with manic depression, it is mostly caused by most of what I said above, but in a more prolonged timeline, wich carries a person to the limits in wich he can no longer deal with his self loathing, completely separetad of social life, and just decides to end it. Again, this people are really easy to be aware off, enough to try and help, encourging them into society, life, but if this person is too depressed then its just better to get profesional help for them in a way.

Now the Idealistic suicide, is very different from the above, its more of an comitment towards death and lifes achivements, sort of like Socrates, this is when people kill themselfs to prove a point, some may kill themselfs to prove they love someone like others may just do it to prove society wrong. In this cases your sympathy would derive more on where you stand with this persons ideals, and if there would of been some other way besides death, who was there to help him?, and those sort of things.