Iran has probably pumped hundreds of millions of dollars into Syria in one way or another. That's some sort of real commitment. The West and the US are only really interested in Syria to try to lure it away from Iran. It's fairly likely that if they ever managed that, the West would then readily abandon Syria, because the West and the US still want to cosy up with Israel. Clinton's a perfect example of that. She can't evem wait to have her ambassafor there before lecturing Assad on the need to stop arming Hezbollah.
Merkel says would welcome constructive Iranian role in any Syria talk (Reuters)
from the article: As the West woos Syria, Assad aligns himself with Iran