simple....I like you as a friend....

It depends on why you want to say it and to whom. For example, you could say 'I'm very fond of you' this is usually followed by a negative such as 'but I don't want to be your lover' if you want to tell someone that you have feelings for them but not romantic ones. On the other hand, if you want to tell your partner that you love them but don't want to marry them, you might say 'Yes I love you, but I don't want to make a serious commitment yet.' If you want to tell someone that you've just met that you really like them but don't want to scare them with the 'love' word, then you could say "I think you're really great. I'd like to get to know you better." There are other possibilities, but you need to be clear about what the message you want to give is, and who it is meant for.