how do you know

If you both FEEL that it is true love then it probably is. Even if it only lasts a short while, it doesnt mean that it wasn't love for as long as it lasted. Circumstances and people change and with it so does love.You have to appreciate it for as long as it lasts and never take it for granted and with any luck at all, it will last a long,long time. How can you know if its real? you can't.