Ofcourse he has no yet confessed his love for her through words. And though he had done it many times through actions, it may be confusing for Gopi to conclude upon his feelings for her(There is Rashi, as well, to confuse her more). Why cant this be because of his guiltiness for his past behaviour towards her?
One more thing that we know is that he is adamant when he's sure to do something. For instance regarding Gopi's studies(he is the one who spoke to Koki and went against his Mom when Gopi was afraid), Even in Rashi-kidnapping track, when Gopi cried that her mamaji won't lie and Rashi had been really kidnapped, Koki didn't believe but Ahem spoke back to koki and took her to Rajpal nagar...I specified all these to say that Ahem is adamant towards something when he believes in that and goes against even Koki... then why cant he had done that in the case of marriage? I think that its because what he had for Anita is not "love"..It might be infatuation or attraction towards her modern way of living.His love for Gopi is well shown in many episodes like accident-Hospital track.
Speaking of hospital track, I remember 1 more thing, when Gopi fell down because of him and when she said it was due to her mistake, do you all remember his reactions, he didn't sit and talk. He felt guilty and went inside the washroom to avoid his feelings been seen by Gopi. From the next day, he made sure that he doesn't make that mistake again. The same, I feel, suits here. He is feeling guilty for his past-behavior but hides it from Gopi and makes sure that he doesn't make the same mistake again. On holi day, at night when he spoke harshly to Gopi(he made his old mistake), he repented for it the next day and clarified to her that it was because of his head-ache(this part of clarification i mean communication and confession is left in the current love track).
[Anita's marriage may be called off due to any reason (may be Rashi or someone else) and she might come and stay at MM. But I think both Ahem and Anita(if Rashi didn't confuse her saying Ahem still has feeling for her) will be clearly moved on. It may be the insecurity that Gopi develops in her due Rashi's KK might make her to leave MM. And this may lead to Ahem's confession or the CVs may surprise us in some other way too].
Sorry guys, I do accept that Ahem need to repent and apologize and confess his love to Gopi and I hope this will happen. I feel the only way Ahem can do this is by "communication" with his wife. But I couldn't able to accept that he adjusts or accepts Gopi only because of his family and values and still loves Anita. According to me, he surely had never loved Anita. He remembers all his bad behavior towards Anita and Gopi and feels guilty and expresses all these as his anger(the first expression that he is comfortable with).
This is my POV guys. Hope I made some sense.