How can I tell if my mother in law likes me?

I feel you can tell if you mother in law likes you if she is attentive to your needs and concerns. If she tries to communicate with you even when there is nothing to really communicate about. If she calls you on occasion or texts you. If she shows interests in your needs, etc.,

Try maybe taking her out on a nice lunch with you and your wife try to always treat her nice she should see that you care

It really depends on the person. Different people reveal things like this in different ways. It is important to remember that other people's opinions of you aren't what counts

Well, it depends on how she acts towards you. She may smile around you a lot, she may talk to you often, and hugs may be a part of that too. You have to pay attention to her smile and her attitude when she's towards you in order for you to know she likes you.

Does she treat you kindly, or as kindly as she treats other people she ostensibly likes (e.g. your partner)? Does she give you compliments? Has your partner suggested that she likes you? Some people show affection in ways that you might not expect, but if you feel like you are being mistreated, you are under no obligation to engage with her any more than necessary.

The simplest answer would be to ask her. If this is too forward for you, try being present and watching her actions towards you through her gestures. Does she maintain eye contact? Does she face you when speaking?

If she's acts and behaves kindly and respects and honour your decisions of life. Treats you like her own kid

I think it's important that you're even asking this question. It shows that you care enough to want her to like you and if your mother in law is blessed with normal human perception then she'll see that and be flattered. Some questions to ask yourself might be: Does she greet me warmly? Does she try to limit my time with my spouse? Has she ever expressed any negative opinions of me to my spouse? How does her approval affect my own self-image and my spouse's perception of me?

She'll probably talk to you a lot, talk about you a lot, or want to engage in conversation with you a lot. You'll see her smile a lot when she talks to you and she'll want to include you in sorts of things to show you how much she likes you.

Try spending some casual time alone with her and see how she behaves around you. You can give her a gift that you can afford and see how she reacts to it.