Plance has so much evidence that it will be canonLike let's take a look at this peice of information from shippingwikia.com
It's pretty good proof but still not enough because you can get the same "proof" for Klance and all that.
Well she blushes and the only time she does that is when looking at lance.
Those are blush marksAnd she also only gets mad at lance for talking about girls she even teases Hunk about shay and doesn't get mad at Matt for doing it with Allura. She also hits him for flirting with the girls.
Next we have Pidge and with her equipment this one could be taken in different routes though
Pidge gets mad at Hunk for touching her equipment but we see lance taking her stuff all the time.
We can also see her when lance asked where she got the tech because it doesn't look like garrison equipment. she smiles big because it's her time to show off to him.
She cares for him a lot and was also the first to show concern for Lance when he wasn't in formation when the blue lion didn't open up for him.
Future me: wrong