That is really hard to answer for me of least. [Insert Disclaimer here that this is one view, of which there are as many views as there are individuals on this planet] The bottom line answer for me of least . . . No, you cannot Love someone too much.
I have discovered Love is both confining and all encompassing IMHO. With people I try to use the wisdom of 'The Four Loves' by C.S. Lewis as a guide. That book can be perplexing and challenging to read at times. The bottom line is it breaks Love into four areas:
Storage - Affection
Philia - Friendship
Eros - Romance
Agape - Unconditional Love
Wikipedia does a fair presentation with an easy to read scholastic approach. There are many discoveries made on the web in its regard. A very, very short explanation is it shares there are two components of Love;
The source of the Give Love when there is a Need Love may be at task while defining which of those 'Four Loves' is at issue. For instance if one has a long distance relationship or even an online relationship the communication and the action for romantic Love regarding 'Need Love' and meeting that with 'Give Love' is at times very challenging. However that essential 'Need Love' exists.
Meeting that need may mean making a leap of faith to 'Friendship' or possibly a source of 'Unconditional Love' for fulfilling that 'Need Love'. That need is met with 'Give Love' from another resource. Simultaneously that odd feeling that one may have too much love discovers another or others with a need for 'Love'.
Love is essentially transformed while remaining of form. Transformation occurs through format, expression, communication, and fellowship.