He seems to be losing interest...

I am a 25-year-old woman in a long-term relationship with a guy who is around two years older. For the past couple of months, I have begun to feel as if his heart is not in this, and I can’t explain why it feels like a chore. When I ask him about it, he says I am imagining things and tells me that it’s normal for people who have been together for a long time to feel this way. I don’t want to compare our relationship with what everyone else feels, but if he isn’t acknowledging what I feel, I am starting to question whether I am being too sensitive. Is this what happens after people have been together for a while? Should I just accept that this it normal and try getting used to it?
No one should tell you how or what to feel because you are entitled to your feelings and what they do to you. If your partner isn’t acknowledging that this is a problem, it is confirmation that everything isn’t right in this relationship. Healthy relationships are about allowing both people to feel what they do, and making sure their concerns are addressed. This should become easier, not harder, with long-term relationships. Try and take some time to pinpoint what makes you feel this way—is it the way he behaves, his words, or actions—and insist on talking about it. If he continues to brush these things under the proverbial carpet, you should reconsider whether this relationship is meeting your needs and expectations. Being with someone for a long time isn’t the same as being in a healthy, mutually respectful space.

A girl I was dating used to enjoy being with me until I told her I was falling in love with her. Now she doesn’t respond to my messages. What do I do?
You can wait until she responds or accept that her silence means she doesn’t reciprocate your feelings. You can also ask her a direct question about this.