For me, following were the instances that prove he loves Meety and not Manushi:
1. Dead body- He was worried about Meety not forgiving him not what happened to didi!
2. 24/7 inko memories banani hoti hai Meety ke saath..
3. He believed Meety is hotheaded enough to do gundagardi but still accepts her!
4. He realises what is imp for Meety- Her papa ki chain, bike and house.
5. He was searching raat bhar desert mai for Meety whereas he threw didi out of house at night..
Aur bhi bahut saare.. 🤧
I feel the missing piece is few dialogues, from HM he was saying manushi affected him but never said he is missing her - there is a huge difference! She was affecting him as he was in distress, guilt and disgust of falling for a face that was shallow. He is shown as an emotional guy and it takes time to get over that feeling of disgust when you realise you were running after the wrong person. Also, there was guilt of hurting meety in that getting over process. I can only wish they used better words than affecting as it created lot of confusion for many.
Regarding meety, he has all elements in place - he cares, thinks of her before others, trusts and his eyes say he is attracted too. The difference is the emotion is way deeper than physical attraction so we see it different than just him ogling. There are way too many instances to show that.