Is there something wrong with me?

Hi everyone. I've been in a relationship with my boyfriend for 3 and a half years. We love each other and love spending time together. Everything is great and we're planning our future together. However, since the beginning of our relationship, there's been one problem. I often feel like having sex or some kind of sexual activity with him, while he is not that into it. I'm the type of person that likes to do some kind of sexual activity as icing on the cake after other activities. For example, I went with my boyfriend on a walk today, we enjoyed spending the day in the nature, and I suggested we do something later in the nearby woods. He smiled and later ignored it. Or, he often rejects my offer to have sex in the evening. Things like that.. We talked several times about it, but it barely got better. Whatsmore, I feel like I'm putting pressure on him sometimes, which maybe makes him even more reluctant to having sex. Am I being too needy? Is it normal to want to do sexual activities so often (every day or every other day)? I'll share more details or examples if needed.