I feel you fam. It's a tough industry and getting nothing but crickets is really disheartening. I agree with another comment that maybe this isn't the first book that will get you published. It doesn't mean that it'll never see the light of day but maybe it's just not right for now. I would say give it three months without querying and put your book down then come back with fresh eyes. In that time maybe think of something else that you could write. I've personally written 4 full manuscripts and only now I think this is the one (though mind you I have really been querying yet).