Yes. Since, at least in the most basic forms of, for example, pair bonding and care for offspring, it evolved at least three different times, ( probably many more ) in three different groups of animal, at least, mammals, birds, and fish. Which would be strong evidence that it is caused by quite a strong underlying natural law.

That is the science so far, now merely my speculation.

It is interesting, that it never seems to have evolved in amphibians or reptiles, at least not the modern ones, perhaps because it does seem, that even the pair bond type of love, is related to, and only evolves, in species which exhibit continuing care for offspring. It could be that pair bonding is a needed adaption in species that exhibit care for offspring, but it could also be, that it is at the same time a useful spin-off from parental love. Since nature is always thrifty with adaptations, often making one mechanism serve many roles. ( We use noses to breath, smell, taste and elephants even use them to manipulate, birds use feathers to fly, keep warm and display etc. ) And while therefore love may have evolved to serve the use of parental care, the same mechanism may also have co-evolved, at the same time, to enable pair bonding and other useful social bonds such as love of mutual supporters. ( Friends and allies. ) All of which would be useful to animals giving long term care to offspring.

And there is some evidence that you are looking at one mechanism, since love often expresses itself in the same ways for different groups. We don't notice that, because it seems banal and obvious so we never give it a thought, but it is a notable thing that we actually express different forms of love/affection in the same ways. For example, we kiss our children, our sexual partners and our friends. Where if we are dealing with three separate mechanisms it would be at least plausible to expect different expressions. Which is even more powerfully in the case in for example of the fish called Cichlids, many species of which, mouth brood, or in other words keep their offspring safe by holding them in their mouths. Yet it is also a commonplace in the genera to kiss sexual partners, in other words to use the same organ in a similar way, to express interest in both offspring and sexual partners

Ha ha ha! I used to think so.

I think you need to define your terms. For starters, how do you define "love"?

It does for me

IDK about love, but desire sure does

It seems to me that you have posted a rhetorical question and are not seeking an answer to it.

I'd say of course, it's a feeling. Are feelings real and would they exist without the body? Is the body real or is it a manifestation of the feelings?
Love exists and in many forms, I know that for sure.

Yes. I love many. In many different ways.

Do not. Know, but proving it only works if you use fun.

It does…and in many forms as @Julie808 has set out below. If it’s romantic love in particular you’re referring to and you feel uncertain enough about it to feel the need to ask the question - “Does Love Exist?” - then I’d say you haven’t ever really experienced that most exquisite of emotions. If you had you wouldn’t need to ask the question.

However, it’s by no means the only form of love and the deep and enduring love between parents and children, and other kin, and even between very close friends of the non filial variety or our domestic pets can fall into the category of real love.

Love is a feeling, and feelings exist and can cause joy and pain. There are many kinds of love. I have experienced some types of love and I see people every day professing their love.

Love can be evidenced or proven by actions and deed. Love can be created, nurtured, built, and even faked. It can be felt between a person and other people, places, things, animals, music, art, and a myriad other concepts, real or imagined. It doesn't come from nothing, but is stirred into existence by circumstance.

I'm surely not an expert, but those are my thoughts on this human emotion called love.

From love can come jealousy, protectiveness, compassion, empathy, generosity and many other emotions and feelings. All these interconnected emotions exist in varying degrees and are caused by our interaction with people and things outside ourselves, and is what makes being human more fun than being a rock.

For some people it does.

Yes.

Very much so.

I believe it does but mostly as a familial thing. Between general public it's very rare. Other things get confused as love but, in hindsight, weren't.

Yes

Yes