Saalam Aleyckum, does Allah forgive everytime i make sins ? Even if i repeat thousand times the same ? And do you know how can we know that Allah loves us ? I feel like i don't deserve Allah mercy.
Alaikumassalam wa rahmatullah,
There is no limit to God’s forgiveness. If you are able to to sincerely ask for forgiveness, then that in itself means that God is willing to forgive you. When God decides that a person no longer deserves forgiveness then they become the type of person who never ask for forgiveness. This is what the Quran means by “sealing” the hearts of those who sin so much and do so many evil deeds that God decides to seal their fate and prevent them from seeking His forgiveness (as in the case of the Pharaoh in the story of Prophet Moses 
).
If you feel inspired to ask for forgiveness, if you are not happy with yourself and wish to be better, then that means God loves you and is there to help you. When God does not love someone He lets them become happy in their own state so that they never feel inspired to seek guidance or forgiveness and in this way their life goes to waste while thinking they are doing really well.