How do you know love exists , isn't just a hormone surge and isn't just a mutual relationship based on give and take?
I know Allah exists for many bigger reasons and smaller simple ones too. All i have to do to is wish for something and it comes right infront of me in the most unexpected of ways, without me having to try for it. Like just a few days ago, i had this craving for a nice dark fudge, a good cupa coffee and some condiment that we have in our region. The moment i open the door outside, my friend( who just came back from another city) was standing outside and invited me in , just out of the blue, with ALL these things that i had just 'wished' of having that day but hadn't contemplated to be happening so quickly infront of my eyes.
Ofcorse you will name it coincidence, but I feel that Allah listens to me and my thoughts more closely than anyone can. This happens to me a LOT of times and makes one think that somebody out there is there for you, can overwhelm you with joy in so many ways, listen to you closely and know all your deepest wishes that you don't really even tell anyone about. Makes one fall in love with him over and over again ( ahh the molten fudge *faints* )
I know that love exists for me because it's raw experience, it's a qualia: note that we can know qualia exist because we experience them directly. God, or Allah, is not a qualia: you may experience a feeling for what you think is Allah (and that feeling itself is a qualia) but the existence of Allah remains unevidenced.
To make the analogy more obvious, I love Alicia. The experience of love is qualia, but Alicia is not qualia -- but luckily, I have lots and lots of evidence that Alicia actually exists, so my love for Alicia is entirely rational.
Now how about loving Allah? Love is qualia, that part doesn't require support -- but the Allah existing part does require support.
I most definitely would say it's highly likely the fudge and coffee incidence is coincidence and an example of confirmation bias (Confirmation bias - Wikipedia, the free encyclopedia): I bet you forget about all the times you want something and don't get it, or write it off as "not in Allah's plan" for you, but you remember the times where wishing for something you do get it.
I don't consider that very good evidence because confirmation bias, while not directly a fallacy, is not a very good truth-seeking method.