Complex sentence: It is rumored that University high school has a high rate of suicides while this may be just an unlucky coincidence many attribute it to the high level of homework and the rapid loss of social life may just cause the stress to get to very high levels.
Split into simpler sentences: It is rumored that University high school has a high rate of suicides. While this may be just an unlucky coincidence, many attribute it to the heavy course load and corresponding loss of social life, causing stress to get to very high levels.