It seems that the question of alchohol consumption comes up on this forum periodically. I’ve been known to have a drink or two on somewhat regular basis, in the interest of full disclosure. And, I have no particlar expertise by way of education. So, my opinion is offered a such and no more.
I doubt anybody would say that a glass or two of wine at the end of the day is excessive. The regularity may be troublesome, but probably even that is not serious. If you’re truly worried about the physical ramifcations, you should seek the help of a doctor.
I think your concern about whether it constitutes a sin is of more concern to me. There are some–and you can easly find numerous threads on this subject-- on this forum that insist that alchohol consumption, in any quantity is sinful. I don’t buy that at all. There are others that seem to accept alchohol consumption as being perfectly alright even if consumed before driving so long as it is in small quantities. I think this is fool hearty. Any amount of alchohol consumption dulls judgement, slows reaction time and loosens inhibition, even if by seemingly imperceptable amounts. I assume you’re dong this in the safety and comfort of your home. Non-issue.
If you’re concerned enough about the amount, frequency, or your own perceived inability to stop then that is more problematic, IMHO. Not because I am making a judgement about it, which I am not, but rather because you chose to ask it in a public forum. If it truly bothers you that much then perhaps you do need guidance from your priest, not from members of this forum. Short of that, you could perhaps test yourself. Try praying a rosary rather than having the first glass. Get a daily devotional as an alternative. Consider setting a period of time in which you will stop and replace the time with a good work. You may find helping others or doing some good in your community as caliming and relaxing as a couple of glasses of wine. You could resolve to give it up for Lent. Now, there’s an idea. Anyway, I would guess that a professional would tell you that at your level of consumption it’s probably not harmful. If it grows or gets in the way of your relationship with God then it’s a problem that needs attention. And, finally, take it easy on yourself. God loves and forgives. His mercy is boundless