Maybe you're becoming disheartened about Trump and his chances because you're listening to the people that WANT you to feel that way.
If you're on twitter, I suggest you follow, or at least check out @DanScavino who posts positive (or at least fair) articles and videos about the campaign.
twitter.com/DanScavino
The MSM and dishonest press can lie about polls, but honest photographs of crowds at rallies can't lie about how many people are interested in seeing the next president and hearing what they have to say.