Hang on to that. Yes, it will get better! Feeling and saying the words and getting the experience and "recovering" are all part of learning to navigate yourself through Life. No one can "teach" you about love and your feelings and when and how to tell another of your feelings, we have to practice all that and see what happens and watch ourselves and how we respond and then try it again from a different direction with a different emphasis, etc. There's nothing smooth and easy about life and interacting with others.

It sounds good in our head to say "I love you and love having you in my life" and to have the other respond as we imagine we would like but there are too many parts to the reality for it to ever be like that; being able to say the words is a part that is difficult but, even more difficult is learning to say the words just because that is what you want to say, not because of any expectation of anything at all in return.

Wanting to express yourself, knowing who you are and that it is the "right" time for you to express yourself in that way and that alone being what you want to do at that time -- that is worth aiming for.

Even more difficult than that though is getting to know the other person well enough that what you say to the other person is both what you are/want to say and what the other person would love to hear, to be able to add to the other person's life by what you have to say to them, to be able to say that which draws the two of you closer while still acknowledging the other and their Self as an individual, to help balance the interaction or relationship.