Hi afon,
Don't just give up yet. In the late 70's (when I was a very young man), I loved the Vienna classicists (Beethoven, Mozart, Schubert) and the 19 century romantics (Schumann, Brahms, etc), but the music of Mahler left me cold. Then I saw Ken Russel's movie "Mahler" (it's available on YouTube) and thougt that a lot of the background music was very good (only Mahler music was used). So, I went to the record shop and bought me a Mahler symphony (M5, BRSO/Kubelik) and listened to a full Mahler symphony for the 1st time. And the reaction was: WHAT A BUNCH OF CRAP. Really shit. $15 in the bin; I'll never play these records again. Then som time passed and I really don't remember what happened (I think I attended a concert with a Mahler symphony), and, alas, in the beginning of the 80's I loved Mahler's music. And now, it's more like an obsession, lol. So my advice is, don't try to push it, go to a concert with one of his "easy" symphonies (like the 1st or the 4th); if the love for M's music comes, it comes (but it may take some time). But NEVER NEVER NEVER feel guilt because you don't like things that others like. Good luck to you.
Roffe