If it is toxic that is not a true love. True love means you are losing, when it is toxic there is ownership and when you want to own someone in the name of love that's not love.
Too much love that is too overwhelming always leads to toxicity due to jealousy. When a person can't control how much he or she loves you, they would become insecure and start expressing toxic behavior which can suffocate the partner.
Toxicity is the worst thing there is in any type of relationship, whether in a friendship or in love, so all toxic love is either corrected or ends, but you clearly cannot live with toxic love.