Merci, mon ami, et je suis désolé de ne pas bien parler français. Je t'aime.
Here's a breakdown:
* Merci: Thank you
* mon ami: my friend
* et: and
* je suis désolé: I am sorry
* de ne pas bien parler français: of not speaking French well
* Je t'aime: I love you (informal, used for friends and family)
Important Note: "Je t'aime" is a very strong declaration of love. If you are not sure about the person's feelings, it might be better to stick with a simpler expression like "J'aime bien te voir" (I like seeing you) or "Tu me plais beaucoup" (I like you a lot).